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
better copy on a few default topics
Reset Read Data not needed here
updated checks of environment with Rails.env by Rails.env methods
updated test with proper change of Rails.env during test
Merge pull request #2665 from akshaymohite/optimization-fixes

updated checks of environment with Rails.env by Rails.env methods
FEATURE: vBulletin importer
FIX: vanilla importer when private topic had no first post (WAT)
Fixed ActiveRecord validation for post_id in incoming_link.rb
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
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