fix(build): only include sass if sass is selected

Sass-bootstrap should only be included if the user selects sass

Fixes #449

templates/common/_bower.json

@@ -3,10 +3,10 @@
   "version": "0.0.0",
   "dependencies": {
     "angular": "~1.2.0",
-    "json3": "~3.2.4",<% if (bootstrap) { %>
-    "jquery": "~1.10.0",
-    "sass-bootstrap": "~3.0.0",
-    <% } %>"es5-shim": "~2.1.0"<% if (resourceModule) { %>,
+    "json3": "~3.2.4",
+    "es5-shim": "~2.1.0"<% if (bootstrap) { %>,
+    "jquery": "~1.10.2"<% } %><% if (compassBootstrap) { %>,
+    "sass-bootstrap": "~3.0.0"<% } %><% if (resourceModule) { %>,
     "angular-resource": "~1.2.0"<% } %><% if (cookiesModule) { %>,
     "angular-cookies": "~1.2.0"<% } %><% if (sanitizeModule) { %>,
     "angular-sanitize": "~1.2.0"<% } %><% if (routeModule) { %>,