FIX: force encoding for title field

Job exception: incompatible character encodings: UTF-8 and ASCII-8BIT
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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
Also import Q+A comments
security updates, firewall note
UX: Remove sortable column from "Topic" and "Users" column.
FIX: Clicking "Latest" while ordering by a column should reset the
order.
FEATURE: trust level 3: likes received must be on min_likes_received/3 different days, and be from min_likes_received/4 different users
Merge branch 'master' of github.com:discourse/discourse
More deprecations to allow us to work on future versions of Ember
FIX: Editing a topic's title should be rate limited too.
FEATURE: import attachments in phpbb3 importer
FIX: Autoplaying videos, updates onebox gem.
remove debug puts
FIX: badge granted titles were not being revoked when badge was revoked
FIX: handle paste events for auto completed fields
FIX: add missing transliteration rules
FIX: not showing any search results when scoped on user
FIX: after visiting "top" unread/new tip rendered in large font
FIX: streaming incorrect events into all tab
Added transliteration for extra diacritics