[Build] Allow bundles to be removed

Allow bundles to be removed by:

* Waiting for explicit activation before bootstrapping,
  providing a time period when bundles could be removed.
* Adding a remove method to BundleRegistry

index.html

@@ -26,8 +26,12 @@
     <meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, user-scalable=no">
     <title></title>
     <script type="text/javascript"
-            src="bower_components/requirejs/require.js"
-            data-main="main.js">
+            src="bower_components/requirejs/require.js">
+    </script>
+    <script type="text/javascript">
+        require(['main'], function (mct) {
+            mct.run();
+        });
     </script>
 	<link rel="icon" type="image/png" href="platform/commonUI/general/res/images/favicons/favicon-32x32.png" sizes="32x32">
 	<link rel="icon" type="image/png" href="platform/commonUI/general/res/images/favicons/favicon-96x96.png" sizes="96x96">

main.js

@@ -89,5 +89,11 @@ define([
     './example/generator/bundle'
 ], function (Main, legacyRegistry) {
     'use strict';
-    new Main().run(legacyRegistry);
+
+    return {
+        legacyRegistry: legacyRegistry,
+        run: function () {
+            return new Main().run(legacyRegistry);
+        }
+    };
 });

src/BundleRegistry.js

@@ -44,5 +44,9 @@ define(function () {
         return Object.keys(this.bundles);
     };
 
+    BundleRegistry.prototype.remove = function (path) {
+        delete this.bundles[path];
+    };
+
     return BundleRegistry;
 });

src/BundleRegistrySpec.js

@@ -68,6 +68,21 @@ define(['./BundleRegistry'], function (BundleRegistry) {
                 expect(bundleRegistry.get(testPath))
                     .toBe(testBundleDef);
             });
+
+            describe("and then removed", function () {
+                beforeEach(function () {
+                    bundleRegistry.remove(testPath);
+                });
+
+                it("appears empty again", function () {
+                    expect(bundleRegistry.list()).toEqual([]);
+                });
+
+                it("does not contain the removed bundle", function () {
+                    expect(bundleRegistry.contains(testPath))
+                        .toBe(false);
+                });
+            });
         });
 
     });