cache dart2js compile results
Improved unit test on app name
Merge pull request #2958 from dinhviethoa/unittest-app-name

Improved unit test on app name
Merge pull request #2952 from devoncarew/devoncarew_cache_compiles

cache dart2js compile results
Merge commit '022c17d6033686b1f411e8e2ab601ce6c72330d0' into 0.14