Make aloha_src a python module
Fix aloha editor loading pages when tabs are opened in  opened in single-page applications
Add configuration support for not running sanitizer on per instance basis

Conflicts:
	aloha_src/static/js/plugins/common/contenthandler/lib/sanitizecontenthandler.js
Use Aloha.browser shim
Add parentFormElements setting toents setting to allow floating the UI bar above a parent form element