Auto-anchor attribute regexes, document _validTags
FIX: Use lang- prefixes for HLJS; add nohighlight for ...

text; use a proper whiteListTag() call.

Old posts are not affected - no global rebake is necessary.
Clean up validateAttribute() function

Remove code duplication
FEATURE: Allow explicit rel="nofollow" on links
Fix JSHint
Fix data-* behavior (failure to understand own docs)
Update Markdown tests
Add emoji pl_PL localization
Remove href attribute from tab link to prevent duplicate event on enter.

Because Discourse doesn't preventDefault on links with an href of "#"
this tab-able link was firing a click event when enter was pressed. This
had the unfortunate side effect of breaking the history, making routing
and navigation unreliable.
Feature: Extended user stats in user export csv
Add ?include_raw parameter to topic views
FIX: don't create a new revision when there was an error while saving the post and/or topic
Resfactor: improve syntax extended user stats in user export csv
fixing ban display on usercard and IE11 issue with user page controls
Merge pull request #2942 from awesomerobot/master

fixing ban display on usercard and IE11 issue with user page controls
Merge pull request #2936 from vairix-dfernandez/master

Feature: Extended user stats in user export csv
SPEC: make sure digest doesn't pick any topics in categories that are muted
FIX: Trim the profile text in the user card even if it has multiple lines.
FEATURE: consider SVG as an image when authorized
Simple API for registering custom emoji