TEMP: Trying to add markers with hover-ability.  No luck
Reverting last attempt (using markers).
TEMP: setting up ace.dart locally and testing linking
Resolved conflicts
Hovering events are working.  Temporary implementation of markers
Cleaned up
Merge branch 'master' of https://github.com/dart-lang/spark into umop-hyperlink-hover_hack
Constraining ace to next version
Setup bottom-border marker for underline-like behavior.  Also, turning mouse cursor to pointer when ACCEL'ing over an identifier.
Review fix
Rename class Diff => TreeDiff
Add git diff.
cleanup.
Add diff api to scm.
More work on git diff.
remove debug string.
Merge branch 'master' into treeDiff

Conflicts:
	ide/app/lib/git/commands/diff.dart
Add support for private repos.
more work on private repos.
remove error message on private repo clone.