New field: Whether or not to include an expandable first post for
embedded content.
Interface for expanding OP contents
Remote fetching of blog contents
Adds better reusable error message support. Added to fetching remote
posts. /cc @riking
Minor tweaks to importing first posts
Allow the `content_sha1` column of `topic_embed` to be nullable
BUGFIX: reload site settings on rails reload in dev
fixing blockquotes in composer preview
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