Fix some errors.
recommend latest redis
updating pt_BR translations
move squash up, remove changelog ref, etc.
add references to try.discourse for repros
better link to features category of meta
Merge pull request #1216 from prem-prakash/pt_br_translation

updating pt_BR translations
Merge pull request #1214 from nverba/patch-3

Fix some typos.
FIX: Private Message button wasn't populating username
Never render an avatar img if we know the username is invalid.
FIX: Some failing specs
Prefer unread topics in the same category
FIX: Double load on back button
FIX: Suggested Topics were sometimes disappearing
FIX: Private message link on messages view did not work. Removed a lot of duplication.
Color moderator actions on user stream
FIX: click tracking on attachments wasn't working
fix graphical error
Merge pull request #1217 from ZogStriP/fix-click-tracking-on-attachments

FIX: click tracking on attachments wasn't working
sample ubuntu upstart config file