Merge pull request #16 from tszpinda/master

Update `bootstrap-datepicker` and fix CSS file import

Thank you @ssured, @tszpinda, and @btecu!

Author: soulim

bower.json

@@ -15,6 +15,6 @@
     "qunit": "~1.15.0"
   },
   "devDependencies": {
-    "bootstrap-datepicker": "~1.3.1"
+    "bootstrap-datepicker": "~1.4.0"
   }
 }

index.js

@@ -8,6 +8,6 @@ module.exports = {
     this._super.included(app);
 
     app.import(app.bowerDirectory + '/bootstrap-datepicker/js/bootstrap-datepicker.js');
-    app.import(app.bowerDirectory + '/bootstrap-datepicker/css/datepicker.css');
+    app.import(app.bowerDirectory + '/bootstrap-datepicker/dist/css/bootstrap-datepicker.css');
   }
 };