FIX: force encoding for title field

Job exception: incompatible character encodings: UTF-8 and ASCII-8BIT
--
This exception rise up for correct(!) UTF-8 cyrillic (in my case, but non-latin overall, I suppose) in title field during RSS polling (feed polling url) and breaks topics creation.
So, just force_encoding() makes it work.
due to travis error message: can't modify frozen string
FIX: only show agreed abd deferred flags on user's profile
FIX: invite email should be verified against email_domains_blacklist
Merge pull request #2864 from techAPJ/patch-3

FIX: invite email should be verified against `email_domains_blacklist`
Add emoji ru localization
A mucher saner API for updating the title of routes, even when nested.
Properly sends the title of the page to google analytics
Minor documentation change to `PageTracker`
FIX: unread was being tagged as "new" in the `PreloadStore`
FIX: Say the file uploaded is too large, not "image" as you can upload
other kinds of files.
FIX: CSS on admin referrals broke with the fixed table. See:

https://meta.discourse.org/t/admin-dashboard-top-referred-topics-links-overlap-with-clicks/20945
FIX: Check for word boundaries with censored words.
FIX: Category badges in the header should use the primary header color
FIX: Broken build
Merge branch 'tests-passed' of git://github.com/discourse/discourse into emoji_ru_localization
FIX: Bug when sorting by category column, navigating to home
FEATURE: auto-close topics based on last post
FIX: Cursor would stay on lightbox when hitting the back button
rename export/import in favor of backup/restore for better consistency
FIX: BBCode was trimming leading space in `[code]` blocks