Add a umd wrapper for commonjs and amd support

Gruntfile.js

@@ -54,6 +54,12 @@ module.exports = function (grunt) {
         banner: '<%= tag.banner %>'
       }
     },
+    umd: {
+      dist: {
+        src: 'dist/<%= project.name %>.js',
+        objectToExport: 'echo'
+      }
+    },
     uglify: {
       files: {
         src: ['dist/<%= project.name %>.js'],
@@ -88,6 +94,7 @@ module.exports = function (grunt) {
   grunt.registerTask('default' , [
     'jshint',
     'concat:dist',
+    'umd:dist',
     'uglify',
     // 'connect:livereload',
     // 'open',

package.json

@@ -1,6 +1,7 @@
 {
   "name": "Echo",
   "version": "1.5.0",
+  "main": "dist/echo.js",
   "homepage": "https://github.com/toddmotto/echo",
   "author": "Todd Motto",
   "description": "Lazy-loading with data-* attributes, offset and throttle options",
@@ -26,6 +27,7 @@
     "grunt-contrib-watch": "~0.4.4",
     "connect-livereload": "~0.2.0",
     "grunt-open": "~0.2.0",
+    "grunt-umd": "^1.7.3",
     "matchdep": "~0.1.2"
   },
   "peerDependencies": {

src/echo.js

@@ -1,4 +1,5 @@
-window.Echo = (function (global, document, undefined) {
+/* exported echo */
+var echo = (function (global, document, undefined) {
 
   'use strict';