Add folders to git index.
Create and  update folder status.
Fetch and folder status from scm optimized.
Show folder status in files view.
show git add option for folder.
Merge branch 'master' into fix_bug_in_index
don't track .git files.
Rename updateIndexFor entry in git index.
indents and rename in commit.
Fix bugs in git status.
percolate change to ancestor folders for git status.
indent and cleanup.
Merge remote-tracking branch 'origin/spark-dialog-3' into spark-dialog-5-styling-controls
WIP control styling: undoing Bootstrap
Improve plus-minus buttons' look in "Settings" dialog
Use SVGs from Polymer for plus-minus buttons
Cleanup
Merge remote-tracking branch 'origin/spark-dialog-4-styling' into spark-dialog-5-styling-controls
Merge remote-tracking branch 'upstream/master' into spark-dialog-5-styling-controls
Revert some of the changes in `Improve plus-minus buttons' look in "Settings" dialog` (reverted from commit 64d39721323c9d03c1a9b271e33958db7ff8c611)