Updated German l10n.
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
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"
Merge pull request #595 from nverba/patch-1

Added Autoscaler guide to advanced heroku deployment
Merge pull request #598 from kubabrecka/html_title

let <title> contain site name instead of just "Discourse"