diff --git a/.gitignore b/.gitignore
index 9997532ad..f7b0bca42 100644
--- a/.gitignore
+++ b/.gitignore
@@ -22,5 +22,4 @@ _testmain.go
 *.exe
 
 gpm
-data/
-repo/
\ No newline at end of file
+data/
\ No newline at end of file
diff --git a/README.md b/README.md
index ca0a17e32..18f91c638 100644
--- a/README.md
+++ b/README.md
@@ -12,7 +12,7 @@ gpm(Go Package Manager) is a Go package manage tool for search, install, update
 
 ## Todo
 
-- Command `build` add current path to GOPATH temporary.
+- Command `remove` is for removing packages.
 - Add gpm working principle design.
 - Add support for downloading tarballs from user sources.
 - After downloaded all packages in bundles or snapshots, need to check if all dependencies have been downloaded as well.
@@ -26,7 +26,7 @@ gpm(Go Package Manager) is a Go package manage tool for search, install, update
 - Command `check` is for checking and downloading all missing dependencies.
 - Command `daemon` is for auto-compile web applications when debug it locally.
 - Command `update` is for checking updates.
-- Command `remove` is for removing packages.
 - Command `search` is for searching packages.
 - Add feature "struct generator".
 - i18n support for Chinese.
+- Add built-in application version in order to backup data when users update.
diff --git a/conf/gpm.toml b/conf/gpm.toml
index 6455717c9..e8253dfa0 100644
--- a/conf/gpm.toml
+++ b/conf/gpm.toml
@@ -1,7 +1,7 @@
 # This is a configuration file for gpm with toml format.
 
 title = "gpm(Go Package Manager)"
-version = "v0.1.3 Build 0522"
+version = "v0.1.4 Build 0522"
 username = ""
 password = ""
 user_language = "en-US"
diff --git a/doc/bitbucket.go b/doc/bitbucket.go
index df3d97787..6aea175c2 100644
--- a/doc/bitbucket.go
+++ b/doc/bitbucket.go
@@ -23,9 +23,8 @@ var (
 
 // GetBitbucketDoc downloads tarball from bitbucket.org.
 func GetBitbucketDoc(client *http.Client, match map[string]string, installGOPATH string, node *Node, cmdFlags map[string]bool) ([]string, error) {
-	commit := node.Value
 	// Check version control.
-	if m := bitbucketEtagRe.FindStringSubmatch(commit); m != nil {
+	if m := bitbucketEtagRe.FindStringSubmatch(node.Value); m != nil {
 		match["vcs"] = m[1]
 	} else {
 		var repo struct {
@@ -39,10 +38,10 @@ func GetBitbucketDoc(client *http.Client, match map[string]string, installGOPATH
 
 	// bundle and snapshot will have commit 'B' and 'S',
 	// but does not need to download dependencies.
-	isCheckImport := len(commit) == 0
+	isCheckImport := len(node.Value) == 0
 
 	// Check if download with specific revision.
-	if isCheckImport || len(commit) == 1 {
+	if isCheckImport || len(node.Value) == 1 {
 		tags := make(map[string]string)
 		for _, nodeType := range []string{"branches", "tags"} {
 			var nodes map[string]struct {
@@ -63,7 +62,7 @@ func GetBitbucketDoc(client *http.Client, match map[string]string, installGOPATH
 			return nil, err
 		}
 	} else {
-		match["commit"] = commit
+		match["commit"] = node.Value
 	}
 
 	// We use .tar.gz here.
@@ -78,6 +77,7 @@ func GetBitbucketDoc(client *http.Client, match map[string]string, installGOPATH
 
 	projectPath := expand("bitbucket.org/{owner}/{repo}", match)
 	installPath := installGOPATH + "/src/" + projectPath
+	node.ImportPath = projectPath
 
 	// Remove old files.
 	os.RemoveAll(installPath + "/")
@@ -142,12 +142,6 @@ func GetBitbucketDoc(client *http.Client, match map[string]string, installGOPATH
 		}
 	}
 
-	node.Value = commit
-	/*	node := &Node{
-		ImportPath: projectPath,
-		Commit:     commit,
-	}*/
-
 	var imports []string
 
 	// Check if need to check imports.
diff --git a/doc/github.go b/doc/github.go
index bb8fe5c51..63d3adf92 100644
--- a/doc/github.go
+++ b/doc/github.go
@@ -103,6 +103,7 @@ func GetGithubDoc(client *http.Client, match map[string]string, installGOPATH st
 
 	projectPath := expand("github.com/{owner}/{repo}", match)
 	installPath := installGOPATH + "/src/" + projectPath
+	node.ImportPath = projectPath
 
 	// Remove old files.
 	os.RemoveAll(installPath + "/")
diff --git a/doc/google.go b/doc/google.go
index 947c4c073..aa60895fe 100644
--- a/doc/google.go
+++ b/doc/google.go
@@ -50,9 +50,8 @@ func getGoogleVCS(client *http.Client, match map[string]string) error {
 // GetGoogleDoc downloads raw files from code.google.com.
 func GetGoogleDoc(client *http.Client, match map[string]string, installGOPATH string, node *Node, cmdFlags map[string]bool) ([]string, error) {
 	setupGoogleMatch(match)
-	commit := node.Value
 	// Check version control.
-	if m := googleEtagRe.FindStringSubmatch(commit); m != nil {
+	if m := googleEtagRe.FindStringSubmatch(node.Value); m != nil {
 		match["vcs"] = m[1]
 	} else if err := getGoogleVCS(client, match); err != nil {
 		return nil, err
@@ -60,12 +59,15 @@ func GetGoogleDoc(client *http.Client, match map[string]string, installGOPATH st
 
 	// bundle and snapshot will have commit 'B' and 'S',
 	// but does not need to download dependencies.
-	isCheckImport := len(commit) == 0
+	isCheckImport := len(node.Value) == 0
+	if len(node.Value) == 1 {
+		node.Value = ""
+	}
 
 	rootPath := expand("http://{subrepo}{dot}{repo}.googlecode.com/{vcs}{dir}/", match)
 
 	// Scrape the repo browser to find the project revision and individual Go files.
-	p, err := httpGetBytes(client, rootPath+"?r="+commit, nil)
+	p, err := httpGetBytes(client, rootPath+"?r="+node.Value, nil)
 	if err != nil {
 		return nil, err
 	}
@@ -78,6 +80,7 @@ func GetGoogleDoc(client *http.Client, match map[string]string, installGOPATH st
 
 	projectPath := expand("code.google.com/p/{repo}{dot}{subrepo}{dir}", match)
 	installPath := installGOPATH + "/src/" + projectPath
+	node.ImportPath = projectPath
 
 	// Remove old files.
 	os.RemoveAll(installPath + "/")
@@ -90,7 +93,7 @@ func GetGoogleDoc(client *http.Client, match map[string]string, installGOPATH st
 		fname := strings.Split(string(m[1]), "?")[0]
 		files = append(files, &source{
 			name:   fname,
-			rawURL: expand("http://{subrepo}{dot}{repo}.googlecode.com/{vcs}{dir}/{0}", match, fname) + "?r=" + commit,
+			rawURL: expand("http://{subrepo}{dot}{repo}.googlecode.com/{vcs}{dir}/{0}", match, fname) + "?r=" + node.Value,
 		})
 	}
 
@@ -128,17 +131,11 @@ func GetGoogleDoc(client *http.Client, match map[string]string, installGOPATH st
 		}
 	}
 
-	err = downloadFiles(client, match, rootPath, installPath+"/", commit, dirs)
+	err = downloadFiles(client, match, rootPath, installPath+"/", node.Value, dirs)
 	if err != nil {
 		return nil, err
 	}
 
-	node.Value = commit
-	/*	node := &Node{
-		ImportPath: projectPath,
-		Commit:     commit,
-	}*/
-
 	var imports []string
 
 	// Check if need to check imports.
diff --git a/doc/launchpad.go b/doc/launchpad.go
index 677a837f5..ecca7da9e 100644
--- a/doc/launchpad.go
+++ b/doc/launchpad.go
@@ -35,17 +35,17 @@ func GetLaunchpadDoc(client *http.Client, match map[string]string, installGOPATH
 			return nil, err
 		}
 	}
-	commit := node.Value
+
 	// bundle and snapshot will have commit 'B' and 'S',
 	// but does not need to download dependencies.
-	isCheckImport := len(commit) == 0
+	isCheckImport := len(node.Value) == 0
 
 	var downloadPath string
 	// Check if download with specific revision.
-	if isCheckImport || len(commit) == 1 {
+	if isCheckImport || len(node.Value) == 1 {
 		downloadPath = expand("https://bazaar.launchpad.net/+branch/{repo}/tarball", match)
 	} else {
-		downloadPath = expand("https://bazaar.launchpad.net/+branch/{repo}/tarball/"+commit, match)
+		downloadPath = expand("https://bazaar.launchpad.net/+branch/{repo}/tarball/"+node.Value, match)
 	}
 
 	// Scrape the repo browser to find the project revision and individual Go files.
@@ -56,6 +56,7 @@ func GetLaunchpadDoc(client *http.Client, match map[string]string, installGOPATH
 
 	projectPath := expand("launchpad.net/{repo}", match)
 	installPath := installGOPATH + "/src/" + projectPath
+	node.ImportPath = projectPath
 
 	// Remove old files.
 	os.RemoveAll(installPath + "/")
@@ -120,12 +121,6 @@ func GetLaunchpadDoc(client *http.Client, match map[string]string, installGOPATH
 		}
 	}
 
-	node.Value = commit
-	/*	node := &Node{
-		ImportPath: projectPath,
-		Commit:     commit,
-	}*/
-
 	var imports []string
 
 	// Check if need to check imports.
diff --git a/install.go b/install.go
index 86c6f1206..a5fe86cbc 100644
--- a/install.go
+++ b/install.go
@@ -240,6 +240,9 @@ func downloadPackages(nodes []*doc.Node) {
 
 // saveNode saves node into local nodes.
 func saveNode(n *doc.Node) {
+	// Node dependencies list.
+	n.Deps = nil
+
 	// Check if this node exists.
 	for i, v := range localNodes {
 		if n.ImportPath == v.ImportPath {
diff --git a/repo/bundles/test_bundle.json b/repo/bundles/test_bundle.json
new file mode 100644
index 000000000..8eee69831
--- /dev/null
+++ b/repo/bundles/test_bundle.json
@@ -0,0 +1,58 @@
+{
+	"id": 0,
+    "user_id": 0,
+	"bundle_name": "bundle_test",
+	"comment": "just a test",
+	"timestamp": 0,
+	"nodes": [
+		{
+			"import_path": "github.com/astaxie/beego",
+			"type": "tag",
+			"value": "v0.6.0",
+			"deps":[
+				{
+					"import_path": "github.com/russross/blackfriday",
+					"type": "commit",
+					"value": "",
+					"deps": null
+				},
+				{
+					"import_path": "code.google.com/p/vitess/go/memcache",
+					"type": "commit",
+					"value": "",
+					"deps": null
+				},
+				{
+					"import_path": "github.com/garyburd/redigo/redis",
+					"type": "commit",
+					"value": "aa31b4b202d4ea44ca45b3c93d71575c02ba35dc",
+					"deps": null
+				},
+				{
+					"import_path": "github.com/go-sql-driver/mysql",
+					"type": "tag",
+					"value": "v1.0",
+					"deps": null
+				}
+			]
+		},
+		{
+			"import_path": "github.com/coocood/qbs",
+			"type": "branch",
+			"value": "master",
+			"deps": null
+		},
+		{
+			"import_path": "bitbucket.org/zombiezen/gopdf/pdf",
+			"type": "commit",
+			"value": "",
+			"deps": null
+		},
+		{
+			"import_path": "launchpad.net/goamz/aws",
+			"type": "commit",
+			"value": "",
+			"deps": null
+		}
+	]
+}
\ No newline at end of file