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
FEATURE: Mark All as Read button for Notifications page

Added a Mark All as Read button to the top/bottom of the notifications user page
https://meta.discourse.org/t/possibility-to-selectively-or-completely-mark-notifications-as-read/20227

Remove notifications property (no longer used)
Don't use __container__ instead use needs: ['user-notifications'], (thanks eviltrout!)
UX Improvement: Autofocus the topic field on edit

- After clicking on the pencil icon to edit a topic, the focus is not set on the input.
- This leads to cases where using keyboard shorcuts (e.g. cmd + left) leads to navigation instead.
- Searching around online, it seems the cleanest way to add a text-field that autofocuses is to create a component.
- I followed the [cookbook](http://emberjs.com/guides/cookbook/user_interface_and_interaction/focusing_a_textfield_after_its_been_inserted/) and did the most naive implementation.
- This focuses the text-field but at the start of the input. Setting selectionStart and selectionEnd solves this problem, but does not work on IE 8 and below.
Add missing transation files and update translations
Merge pull request #2879 from techAPJ/patch-2

Add missing translation files and update translations
Version bump to v1.1.0.beta6
FIX: Category group picker was broken with category path rename
FEATURE: Allow a user to upload an image for their expansion background.
Version bump to v1.1.0.beta6b
[patch] When a post is split out to be a new topic
the topic's last_post_user_id is set to the user who split out
the post.  But, this should really be the user_id of the last post
of the split out posts.
Merge pull request #2880 from verdi327/set_last_post_user_id

[patch] When a post is split out to be a new topic
Merge pull request #2878 from daemonsy/daemonsy_focus_topic_input

UX Improvement: Autofocus the topic field on edit
Merge pull request #2874 from cpradio/clear-notifications

FEATURE: Mark All as Read button for Notifications page
FIX: Show images in the admin section list for badges. Add help text to
indicate icons can be images too.
FIX: Password managers picking name as opposed to username
FIX: when opening links in new window link only worked once
minor fixes to welcome reply glyph images
FIX: Censored word match fail if earlier partial match