support for EC2 IAM roles with Amazon S3 file store/backup
refactor multiple instances of S3 key check logic to single variable
Fix: block parser now uses regexes for end tags. solves code block case, where end tag must be on a line of its own.
Fix assignment of post number to progress position
Use progress bar indices in jump control, too
Merge pull request #2511 from windhamg/s3_iam_role

support for EC2 IAM roles with Amazon S3 file store/backup
Merge pull request #2666 from akshaymohite/optimization-fixes

Fixed ActiveRecord validation for post_id in incoming_link.rb
FEATURE: acting on a flag should not post an automated status message if you already replied to it
Merge pull request #2650 from Elberet/fix-parser

Fix: block parser uses regexes for stop tags, allows stricter matching
FIX: top_menu with category links like category/Meta are not case sensitive
FIX: case-insensitive category lookup when creating topics
Update Translations
Merge pull request #2659 from riking/wrong-progress-pos

Hopefully fix once and for all the 172/160 problem
Merge pull request #2667 from techAPJ/update-translations

Update Translations
FIX: redirect old avatars to proper user_avatar route
FIX: before nuking a user, do a real count of posts instead of relying on user_stat record
FEATURE: add the pencil glyph when the post was edited after the first flag
FIX: Sort order on activity column is incorrect
FIX: Admin group search was failing
UX: Make posts columns link to the last post in a topic.