Include binstubs generated by Rails 4

Commit b516ecc added `bin/` to the .gitignore file. Now that Discourse
runs using Rails 4 by default, however, we should include the binstubs
generated by `rake rails:update:bin` in version control as this is the
recommendation of the Rails core team. Additionally, for those wishing
to deploy Discourse to Heroku, these binstubs are actually mandatory
according to [this article](https://devcenter.heroku.com/articles/rails4).

Other binstubs can continue to be ignored.

Signed-off-by: David Celis <me@davidcel.is>
Small tweaks to Group page
FIX: Component was not refreshing all the time
simpler copy for mailing list mode
clarify on mutes, because noise
NEW: Don't show the filter on the homepage. Just show the Forum's name
Add site setting tos_accept_required. If enabled, users must check a box saying that they've read and accept the terms of service.
Update onebox to fix a couple of bugs
Don't include category definitions on Categories page
BUFGIX: read more should take you to the first post
added translations to spanish
minor copyedits on name entry
attempt to work around concurrency issue with active record
BUGFIX: Use email sender
Try to fix random failing spec
Extract queries to keep logic in the Categories Model

This creates two methods in the Category model. This moves the model
logic to the model and just calls the Category class methods in
ListController.

This also adds tests for the two methods created in the Category
model. The motivation for this refactor is the code climate score of the
this class and readability of the code.

 Please enter the commit message for your changes. Lines starting
Locales/fr: Add filter strings and change :read_more_MF
Merge pull request #1921 from joallard/locale-fr

Locales/fr: Add filter strings and change :read_more_MF
Update Ember for CVE-2014-0046.
Merge pull request #1923 from rjackson/security-update-for-ember

Update Ember for CVE-2014-0046.