added the missing de.user.change translation
Russian translation (actual version)
Merge pull request #1315 from abbat/master

Russian translation (actual version)
Add setting edit_history_visible_to_public to control whether post edits can be viewed by everyone. Uncheck it so only staff users can see edits.
Have BBCode tests go through the cooked code path, as in the future
both parsers will be present in the same module.
Users cannot change their own username after 3 days since registering. Site setting username_change_period allows you to change the number of days.
fixed indention
more translations
some minor user deletion tweaks
copyedit pass on admin descriptions
oops, that should not be there
Merge pull request #1314 from quickwango/patch-1

missing german translations
Delete all posts is allowed for the same amount of time as delete user
Change trust level logs the previous trust level
Replace Clockwork with Sidetiq