#39 pin bootstrap-sass version to 3.4.1

- see twbs/bootstrap-sass#1228 (comment)

Author: cbeyer42

bower.json

@@ -23,6 +23,6 @@
     "tests"
   ],
   "devDependencies": {
-    "bootstrap-sass": "^3.3.6"
+    "bootstrap-sass": "3.4.1"
   }
 }