Merge pull request #78 from matthewp/tabsize

Add delay before focusing on search, tabsize setting.
Change default tab size to 8.
Refactor changing tabsize.
Fixes for the build.

This fixes 2 issues:

1) build.py did not include util.js which is used by the background.js
file.

2) Closure was complaining about a property .default so I changed it to
['default'] which it didn't mind.
Merge branch 'util'

Conflicts:
	app/js/settings.js
	app/js/tabs.js