FIX: Oneboix link target is discourse instance

This is the quickest fix to get Techcrunch oneboxing working.
The right fix would be to update the oembed onebox to work properly for the "link" type.
disable observers in tests, enable as needed, tests are 20% faster
ok ... guard needs these dependencies earlier
this warning is getting in the way of my presentation
Add a link to sidekiq in the dashboard message warning about failed email jobs
FIX: Load more user admin details, even when passed from a list
Add Create Topic button to /categories page
Fix: comma
better multi-select help text
drop 'site' from top title for settings/content
Change help text to indicate you can search by id or url
Expire dashboard data when you upgrade to a new discourse version. Version check data was being cached and causing confusion to people who upgraded.
Add post count to similar posts popup. Fix alignment.
Fix typo in contribution document
Merge pull request #847 from kytrinyx/contrib-typo

Fix typo in contribution document
keep French l10n up to date

:fr:
Remove templateName from topic_closing_view because it doesn't use a template
Show a more useful message when redis config can't be found during init.
Don't cache the problems list with the rest of the dashboard data
Fix the 'no more topics' message for categories with non-ascii names