Fix #2778 Fix #3424
Removes the warning that would appear on new projects when running `ng test` due to there being no files inside `src/assets/`: ``` 23 02 2017 10:45:33.751:WARN [watcher]: Pattern "D:\sandbox\master-project\src\assets/**" does not match any file. ```
Close #4851 Fix #3605 Fix #4850 Fix #4876