cleditor changes:
- Use a doctype of html.
- Force i.e. to use its latest rendering engine.
Try not setting the document domain on embed.
Added the DiscussionController_AfterDiscussionTitle event.
Gravatar plugin.
- Fix profile scheme.
Add count for TagDiscussion.
New Smarty plugin: {categories_link}

{category_link} is already present but links to the currently active
category and not the category index.
Allow long text in mysql structure.
Calculate totals in polls.
Fixed bug where a user's discussion count was not being calculated when a discussion is added.
Allow themes to override WriteDiscussionRow() and WriteDiscussionHeading() so that the whole table can be overridden.
Allow code to force transient key validation.
Fix previews that aren't in the default format.
Fix custom date formats.
Try and speed up active users query.
Remove slow buzz data queries from the dashboard.
Allow django password hash to support sha256.
Merge branch 'release/2.1b1' of https://github.com/vanillaforums/Garden into release/2.1b1