Overhaul of the AMD integration

Now we do not have separate AMD builds, instead we use a UMD wrapper
to support both AMD and CommonJS environments along with the browser.
This has been tested with RequireJS and it correctly imports Select2
and hooks into jQuery.

This means that all builds will include the Almond AMD loader, but
this isn't that much of an issue when you consider the file sizes.
The loader is namespaced so RequireJS and other AMD builders don't
complain about `require` and `define` existing. This is also done
so AMD loaders don't conflict, as Select2's AMD loader should
operate independently of others.

There are now two layers of wrappers that are applied to files,
only one of which is used for the translation files. This allows
us to only load in the internal Select2 modules once, and in
general makes most things cleaner. These have also been pulled out
into individual JS files instead of being stored in JSON files,
allowing us to add comments and make things look readable.

Because we use a few hacks, these files are heavily commented as well.

This closes select2#2945.
This closes select2#2946.

.jshintignore

@@ -1,2 +1,4 @@
+src/js/banner.*.js
+src/js/wrapper.*.js
 tests/vendor/*.js
 tests/helpers.js

Gruntfile.js

@@ -1,10 +1,7 @@
 module.exports = function (grunt) {
   // Full list of files that must be included by RequireJS
   includes = [
-    'jquery.select2'
-  ];
-
-  amdIncludes = [
+    'jquery.select2',
     'almond'
   ];
 
@@ -56,7 +53,7 @@ module.exports = function (grunt) {
     i18nPaths[name] = '../../' + name;
   }
 
-  var minifiedBanner = '/!* Select2 <%= package.version %> | https://github.com/select2/select2/blob/master/LICENSE.md */';
+  var minifiedBanner = '/*! Select2 <%= package.version %> | https://github.com/select2/select2/blob/master/LICENSE.md */';
 
   grunt.initConfig({
     package: grunt.file.readJSON('package.json'),
@@ -65,6 +62,29 @@ module.exports = function (grunt) {
       docs: ['docs/_site']
     },
 
+    concat: {
+      'dist': {
+        options: {
+          banner: grunt.file.read('src/js/wrapper.start.js'),
+        },
+        src: [
+          'dist/js/select2.js',
+          'src/js/wrapper.end.js'
+        ],
+        dest: 'dist/js/select2.js'
+      },
+      'dist.full': {
+        options: {
+          banner: grunt.file.read('src/js/wrapper.start.js'),
+        },
+        src: [
+          'dist/js/select2.full.js',
+          'src/js/wrapper.end.js'
+        ],
+        dest: 'dist/js/select2.full.js'
+      }
+    },
+
     connect: {
       tests: {
         options: {
@@ -227,12 +247,16 @@ module.exports = function (grunt) {
           optimize: 'none',
           name: 'select2/core',
           out: 'dist/js/select2.js',
-          include: amdIncludes.concat(includes),
+          include: includes,
+          namespace: 'S2',
           paths: {
             almond: '../../vendor/almond-0.2.9',
             jquery: 'jquery.shim'
           },
-          wrap: grunt.file.readJSON('src/js/banner.json')
+          wrap: {
+            startFile: 'src/js/banner.start.js',
+            endFile: 'src/js/banner.end.js'
+          }
         }
       },
       'dist.full': {
@@ -241,40 +265,17 @@ module.exports = function (grunt) {
           optimize: 'none',
           name: 'select2/core',
           out: 'dist/js/select2.full.js',
-          include: amdIncludes.concat(fullIncludes),
+          include: fullIncludes,
+          namespace: 'S2',
           paths: {
             almond: '../../vendor/almond-0.2.9',
             jquery: 'jquery.shim',
             'jquery.mousewheel': '../../vendor/jquery.mousewheel'
           },
-          wrap: grunt.file.readJSON('src/js/banner.json')
-        }
-      },
-      'amd': {
-        options: {
-          baseUrl: 'src/js',
-          optimize: 'none',
-          name: 'select2/core',
-          out: 'dist/js/select2.amd.js',
-          include: includes,
-          paths: {
-            jquery: 'empty:'
-          },
-          wrap: grunt.file.readJSON('src/js/banner.amd.json')
-        }
-      },
-      'amd.full': {
-        options: {
-          baseUrl: 'src/js',
-          optimize: 'none',
-          name: 'select2/core',
-          out: 'dist/js/select2.amd.full.js',
-          include: fullIncludes,
-          paths: {
-            jquery: 'empty:',
-            'jquery.mousewheel': '../../vendor/jquery.mousewheel'
-          },
-          wrap: grunt.file.readJSON('src/js/banner.amd.json')
+          wrap: {
+            startFile: 'src/js/banner.start.js',
+            endFile: 'src/js/banner.end.js'
+          }
         }
       },
       'i18n': {
@@ -283,7 +284,11 @@ module.exports = function (grunt) {
           dir: 'dist/js/i18n',
           paths: i18nPaths,
           modules: i18nModules,
-          wrap: grunt.file.readJSON('src/js/banner.basic.json')
+          namespace: 'S2',
+          wrap: {
+            start: minifiedBanner + grunt.file.read('src/js/banner.start.js'),
+            end: grunt.file.read('src/js/banner.end.js')
+          }
         }
       }
     },
@@ -329,7 +334,11 @@ module.exports = function (grunt) {
 
   grunt.registerTask('default', ['compile', 'test', 'minify']);
 
-  grunt.registerTask('compile', ['requirejs', 'sass:dev']);
+  grunt.registerTask('compile', [
+    'requirejs:dist', 'requirejs:dist.full', 'requirejs:i18n',
+    'concat:dist', 'concat:dist.full',
+    'sass:dev'
+  ]);
   grunt.registerTask('minify', ['uglify', 'sass:dist']);
   grunt.registerTask('test', ['connect:tests', 'qunit', 'jshint']);