Adds a new ContentAssistant interface... pretty silly, but it's there.


git-svn-id: http://svn.cmsmadesimple.org/svn/cmsmadesimple@8757 3d254a34-79dc-0310-9e5f-be208747d8a0
Adds a new content assistant factory class that can determine if a certain type of assistant exists, build it, and return it.
Adds a new contentEditContentAssistant to assist with the editcontent functionality for Content objects, and their derived objects.


git-svn-id: http://svn.cmsmadesimple.org/svn/cmsmadesimple@8758 3d254a34-79dc-0310-9e5f-be208747d8a0