support for EC2 IAM roles with Amazon S3 file store/backup
refactor multiple instances of S3 key check logic to single variable
Allow translating "Log In" button in HTML code.
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: If local logins are disabled, sign up button should not show the
form.
FIX: handle importing usernames that are too short, too long, or have invalid characters
Avoid using to_s when performing String Interpolation
FIX: Metamorph error due to malformed HTML
FIX: confusing UI when clicking Delete All Posts button
FIX: PostDestroyer needs to update user stats. Delete All Posts button was broken, making it impossible to delete users.
UX: Squash activity columns together. Show a cold map on the difference
between the last post and original post dates. Fix some missing classes
in the mobile templates and topic map.
FEATURE: export user list
clean up exports weekly
Merge pull request #2656 from akshaymohite/optimization-fixes

Avoid using to_s when performing String Interpolation
Merge pull request #2655 from techAPJ/patch-3

FEATURE: export user list
FIX: add referer to version_check request
we don't need this "or" separator on login page
Not initializing variable for looping if unused in loop
friendlier email rejection message
FIX: Bug with cached topics not being marked as read in your topics
list.