Merge pull request #589 from goshakkk/user-admin-scope

Create the User.admins and User.moderators scopes
Dashboard checks for facebook, twitter, and github configs
Adjust hot to include more recent topics
Updated German l10n.
FIX: "Quote Reply" button gets in the way
Fetch the list of problems more frequently on the admin dashboard
Don't request list of problems from server as often if there weren't any problems
Update VAGRANT.md

Added link to Vagrant download page
Get the "quote reply" button working on iOS
update cs translation
Added Autoscaler guide to advanced heroku deployment

This was the proposed change to add an optional step for including and configuring the Autoscaler Gem in the HEROKU.md doc. I've included a pastable version of the Sidekiq initializer file that only adds the autoscaler middleware in production.   
keep French l10n up to date
FIX: S3 image upload
Show trends on some dashboard numbers
Merge pull request #596 from ZogStriP/keep-french-l10n-up-to-date-2013-03-30

keep French l10n up to date
Merge pull request #594 from kubabrecka/cs_update22

update cs translation
Merge pull request #591 from potthast/german-l10n

Updated German l10n.
let <title> contain site name instead of just "Discourse"
make sure Category.topic_count is consistent with week/year stats
split i18n strings where there are 2 pluralizable variables