BREAKING CHANGE
Before
Previously Angular would run in dev prod mode by default, and you could enable the dev mode by calling enableDevMode.
After
Now, Angular runs in the dev mode by default, and you can enable the prod mode by calling enableProdMode.
we can now filter build graph via --project flag to speed up build performance
usage:
gulp test.unit.js --project=angular2,angular2_material
Closes#5272