Build: drop bower; use npm for front-end deps

Fixes #15186
Closes gh-1620

Conflicts:
	bower.json

.bowerrc

-{
-  "directory": "bower_components"
-}
\ No newline at end of file

.gitignore

@@ -9,5 +9,4 @@
 .sizecache.json
 
 /dist
-/bower_components
 /node_modules

Gruntfile.js

@@ -44,19 +44,18 @@ module.exports = function( grunt ) {
 				}
 			}
 		},
-		bowercopy: {
+		npmcopy: {
 			all: {
 				options: {
-					clean: true,
 					destPrefix: "external"
 				},
 				files: {
 					"sizzle/dist": "sizzle/dist",
 					"sizzle/MIT-LICENSE.txt": "sizzle/MIT-LICENSE.txt",
 
-					"qunit/qunit.js": "qunit/qunit/qunit.js",
-					"qunit/qunit.css": "qunit/qunit/qunit.css",
-					"qunit/MIT-LICENSE.txt": "qunit/MIT-LICENSE.txt",
+					"qunit/qunit.js": "qunitjs/qunit/qunit.js",
+					"qunit/qunit.css": "qunitjs/qunit/qunit.css",
+					"qunit/MIT-LICENSE.txt": "qunitjs/MIT-LICENSE.txt",
 
 					"requirejs/require.js": "requirejs/require.js",
 
@@ -137,7 +136,6 @@ module.exports = function( grunt ) {
 	// Integrate jQuery specific tasks
 	grunt.loadTasks( "build/tasks" );
 
-	grunt.registerTask( "bower", "bowercopy" );
 	grunt.registerTask( "lint", [ "jshint", "jscs" ] );
 
 	// Short list as a high frequency watch task

bower.json

@@ -13,12 +13,6 @@
     "Gruntfile.js",
     "package.json"
   ],
-  "devDependencies": {
-    "sizzle": "1.11.1",
-    "requirejs": "2.1.10",
-    "qunit": "1.14.0",
-    "sinon": "1.8.1"
-  },
   "keywords": [
     "jquery",
     "javascript",

build/ensure-sizzle.js

 var fs = require( "fs" ),
-	bower = require( "grunt-bowercopy/node_modules/bower" ),
+	npm = require( "npm" ),
 	sizzleLoc = __dirname + "/../external/sizzle/dist/sizzle.js",
 	rversion = /Engine v(\d+\.\d+\.\d+(?:-\w+)?)/;
 
+require( "colors" );
+
 /**
- * Retrieve the latest tag of Sizzle from bower
+ * Retrieve the latest tag of Sizzle from npm
  * @param {Function(string)} callback
  */
 function getLatestSizzle( callback ) {
-	bower.commands.info( "sizzle", "version" )
-		.on( "end", callback );
+	npm.load(function( err, npm ) {
+		if ( err ) {
+			throw err;
+		}
+		npm.commands.info( [ "sizzle", "version" ], function( err, info ) {
+			if ( err ) {
+				throw err;
+			}
+			callback( Object.keys( info )[ 0 ] );
+		});
+	});
 }
 
 /**

package.json

@@ -30,10 +30,9 @@
   ],
   "dependencies": {},
   "devDependencies": {
-    "colors": "^0.6.2",
+    "colors": "0.6.2",
     "commitplease": "1.9.0",
     "grunt": "0.4.2",
-    "grunt-bowercopy": "1.1.0",
     "grunt-cli": "0.1.13",
     "grunt-compare-size": "0.4.0",
     "grunt-contrib-jshint": "0.8.0",
@@ -42,9 +41,14 @@
     "grunt-git-authors": "1.2.0",
     "grunt-jscs-checker": "0.4.1",
     "grunt-jsonlint": "1.0.4",
+    "grunt-npmcopy": "0.1.0",
     "gzip-js": "0.3.2",
     "load-grunt-tasks": "0.3.0",
-    "requirejs": "2.1.10",
+    "npm": "1.4.21",
+    "qunitjs": "1.14.0",
+    "requirejs": "2.1.14",
+    "sinon": "1.10.3",
+    "sizzle": "2.0.0",
     "testswarm": "1.1.0"
   },
   "scripts": {