Keep generated bindata out of the repository

Since Makefile is taught to generate bindata when necessary, storing bindata in
repository is no longer convenient. Also keeping bindata out of the repository
makes sure it always reflects the source files.

.gitignore

@@ -37,3 +37,4 @@ gogs.sublime-project
 gogs.sublime-workspace
 .tags*
 release
+modules/bindata/bindata.go

Makefile

@@ -31,9 +31,12 @@ release: build pack
 
 bindata: modules/bindata/bindata.go
 
-modules/bindata/bindata.go: $(DATA_FILES)
+modules/bindata/bindata.go: modules/bindata $(DATA_FILES)
 	go-bindata -o=$@ -ignore="\\.DS_Store|README.md" -pkg=bindata conf/...
 
+modules/bindata:
+	mkdir -p modules/bindata
+
 less: public/css/gogs.css
 
 public/css/gogs.css: $(LESS_FILES)