Zaggino/update extension manager deps

.gitignore

@@ -49,3 +49,5 @@ Thumbs.db
 # Files that can be automatically downloaded that we don't want to ship with our builds
 /src/extensibility/node/node_modules/request/tests/
 
+# Files build by scripts
+/src/thirdparty/semver.browser.js

Gruntfile.js

@@ -341,7 +341,7 @@ module.exports = function (grunt) {
     });
 
     // task: install
-    grunt.registerTask('install', ['write-config:dev', 'less', 'npm-install-source']);
+    grunt.registerTask('install', ['write-config:dev', 'less', 'npm-install-source', 'pack-web-dependencies']);
 
     // task: test
     grunt.registerTask('test', ['eslint', 'jasmine', 'nls-check']);