Added warning about x-frame-options DENY breaking toolbar
Re-worded for clarity
Added more general information on x-frame-option issues
check for django.jQuery existence before using it
Updated rst formatting
Fixed casing of django CMS
Merge pull request #3318 from maestrofjp/develop

DOCO - Added warning about x-frame-options DENY breaking toolbar
Merge pull request #3319 from xavfernandez/develop

check for django.jQuery existence before using it