TRIVIAL: Remove some output from qunit test suite.
remove serif fallback for mobile pre/code blocks
remove serif fallback from code,pre

this was about an ancient Safari / WebKit bug as I recall
https://www.webkit.org/blog/67/strange-medium/
COSMETIC: visual tweaks to the categories page
Make the Visit topic link a button in flags UI
FIX: strip html tags from category badge tooltips
Put the 'Powered by Discourse...' message shown to crawlers and no-js visitors in a footer element so that SEO something something.
Add meta generator tag with the Discourse version. Use a partial for common head elements.
Merge pull request #2431 from vikhyat/badge-system

Custom badge icons
Refactor: split out update process from docker test
Refactor: allow running js or ruby tests only
Merge branch 'master' of github.com:discourse/discourse
BUGFIX: don't require env if its not needed
BUGFIX: bypass fulltext for search in topic
Merge pull request #2422 from peternlewis/honor_email_always_even_if_read

Honor email_always even if notification has been read
minor copyedits on community flag hide pm
strip font-family from pre/code on mobile
BUGFIX: link colors on topic lists
Add multiple grant clarification to description.
FIX: subcategory badge styling problems