Merge pull request #2221 from awesomerobot/master

fixing blockquotes in composer preview
FIX: broken Pagedown editor for About, Site Content and similar places.
better use secondary text color a few places
Merge pull request #2223 from velesin/about_me_editor_fix

FIX: broken Pagedown editor for About, Site Content and similar places.
*minus #show-topic-admin button z-index by 1 which will be covered by #user-dropdown
*Add 14px width for #topic-admin-menu icon, align the button text
Merge pull request #2224 from fantasticfears/tweak

z-index tweaks for #user-dropdown and align the #topic-admin-menu icon
FIX: Allow expanding posts when anonymous, add specs
FIX: Escape name on activity feed
BUGFIX: check image size before uploading an avatar/background
Send email to contact_email if there are flags submitted more than 48 hours ago. Configurable with the notify_about_flags_after site setting.
Support for creating embedded topics via API
FIX: Strips spaces from the end of URLs
Replace underscore with space when showing site setting names
move kernel step up, prep for 14.04 removal
BUGFIX: new users not getting correct error messages
Upgrade Ace editor

(used in stylesheet editor)
Allow rebaking posts for only one site in multisite. Use RAILS_DB.
BUGFIX: ensured logged in wasn't listing all anonymous filters
Markdown Editor clean up.
FIX: notify_about_flags_after description said it sends to moderators. It actually sends to contact_email.