Temporary testing setup
Temporary spinner addition
Temporary progress test
Added font-awesome css to the app folder, changed the reference to it in spark.html, added spinner to the menu bar.
Added all of font-awesome download to app directory (in "font-awesome") and linked to the min.css.  Removed the old font-awesome.css
Created ActivitySpinner class as a singleton and added setShowing(bool) method on it to set activity spinner showing or not.
Changed testing for stages (one click per stage)
Reorganized.  setup handlers.  setup spinner handling
Merging timer code back in.
Finished UI
Remove testing code & unused files
Removed less and scss folders from font-awesome
Moved font-awesome assets out of font-awesome folder and into css / font folders
Resolved conflicts
switched from public to _private vars
Setup test
Moved font-awesome stuff into assets/font-awesome.
Styled spinner
Revert "Setup test"

This reverts commit cdd82fcafac12505af8e11a76d24b42eda7d5a93.
Merge branch 'master' of https://github.com/dart-lang/spark into jobs-ui