CSS CS in process
Fixes dependency of backbone and underscore
Build User APIs with avatar factory
Added syntactic sugar for escaper: '_escape' in lib/Pi/Utility/Filter.php
Merge remote-tracking branch 'upstream/develop'

Conflicts:
	usr/theme/default/asset/css/style.css
Merge remote-tracking branch 'upstream/develop'
Fixes bug for guest account wakeup
Added escape for HTML attributes
Merge remote-tracking branch 'upstream/develop'
Changed theme error-exception.phtml to error.phtml
Merge remote-tracking branch 'upstream/develop'
System module front-end code update