Badges, poll and french Translation

New Badges system
New string in the poll plugin + change the term "poll option"
Re-add some empty strings (like notifications.title)
And updates
Poll - Topic Term

Use topic instead of thread to keep the same term for the user.
Trivial typo
FEATURE: Trust level 4 abilities: pin/unpin, close, archive, make invisible, split/merge topic
clarify invite copy
Add s3_backup_config_warning

Note that only one of the two warnings can be shown, because they are checked in the same method.
remove SSH key generation, not for beginners
Merge pull request #2140 from awesomerobot/master

fixing private category badges and mobile header logo
FEATURE: notify users when linked

Extract out PostAlerter from observer
Track outgoing post links correctly
Notify users they are linked when linked
BUGFIX: Don't resolve oneboxes when cooking

Defer to post save job
require rbtrace in development cause it is handy
use 1.9 syntax
FIX: broken specs after new link alerting code
Dutch translation updated
Dutch translation updated
Merge pull request #2142 from sanderdatema/patch-5

Dutch translation updated
Merge pull request #2135 from Onaldanm/poll-badge-fr

Translation: Badges, poll and french updates
Merge pull request #2134 from Onaldanm/patch-1

Poll - Topic Term
Minor fix for location of osx_dev script
Merge pull request #2143 from czarneckid/patch-1

Minor fix for location of osx_dev script