Update bugfix.

--HG--
branch : bugfix
Remove content from DisplayableAdmin's search_fields since content is not defined on Displayable and may or may not be present on a model that subclasses it and uses the DisplayableAdmin.

--HG--
branch : bugfix
Clean up nav version of user panel.
Added amblitec.com to sites in README
Don't strip any HTML in TinyMCE since filtering is handled by bleach.
569 - replace uses of STATIC_URL in templates with 'static' template tag
site is never assigned when hostname is set, single line addition fixes the problem
Don't depend on unloaded comment state for determining parent-most level of replies in comment_thread template tag.
Merge
Fix KeywordsField swapping of name in model's search_fields when a sequence is used.
Moved the logic for building up search fields in SearchableQueryset into a new method SearchableManager.get_search_fields, which allows externally retrieving the search fields dict that will be used.
Use model's search_fields to populate DisplayableAdmin.search_fields.
Merge
Merge
Fix use of JQUERY_FILENAME with static template tag.
Added David Lawrence to AUTHORS
Add compress tags to js/css in base mobile template.
Fix empty thumbnails for fielbrowser fields in AdminThumbMixin.
Added Basil Mironenko to AUTHORS
Added AJAX/JSON handling for comment/rating login redirects, and comment form errors.