Assorted changes that dramatically improve performance on Android.

- Drop the unused task system.
- Smarter choice of clock.
- Remove several redundant sleep calls in favor of waiting on vsync.
Fixing nits from Josh.
Minor change to trigger build.
Kick build box.
Merge pull request #118 from LoomSDK/BJG-TheSleeperAwakens

Assorted changes that dramatically improve performance on Android.