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.
css tweak - expanding some room for zh_CN
FEATURE: ?include_raw parameter for /t/id/posts.json

include_raw is not added for the wordpress view because it uses the
BasicPostSerializer, and is not a one-line change.

This is the only use of the TopicViewPostsSerializer class, and the
previous change covered the only use of the TopicViewSerializer class.
No other locations include the PostStreamSerializerMixin. Therefore,
this feature is most likely complete.
Merge pull request #2955 from riking/include_raw_2

FEATURE: ?include_raw parameter for /t/id/posts.json
Merge pull request #2949 from fantasticfears/master

css tweak - expanding some room for zh_CN
Merge pull request #2898 from kellec/remove_focus_link_href

Remove href attribute from tab link to prevent duplicate event on enter.
Merge pull request #2848 from riking/whitelist-api

Improve Markdown.whiteListTag, code dialect
Merge pull request #2888 from lidel/emoji-pl-locale

Add pl_PL locale for emoji plugin
Don't raise an error for global regexps; warn the plugin author instead.
Don't add the `g` flag
FIX: Don't use auto sizes for very small images (emoticons)
FIX: Shouldn't overwrite styles in emails that we explicitly set, like category
colors.