Moved jquery.mentionsInput plugin

The jquery.mentionsInput plugin upstream is no longer maintained.

Update JQuery source to jquery.com

Conflicts:
	Changelog.md

New reset password form

Conflicts:
	Changelog.md

Fix image branding logo_caps

Add participants to conversations menu

Make help pages a backbone view

New menu for the mobile version

  - Functional drawer with menu icon

  - Added basic drawer menu with JS code working on /stream

Fix redirect to stream, make labels lower-case

Fix cuke

Updating queries for the stream to be faster

Actually load a different section when requested in get_javascript_strings_for, add spec for changes in JS i18n helper

extending loaded js locales.

cleaned up unused routes. removed some comments. loading help locales only on help view.

removed afterRender from backbone views. extended load_javascript_locales method to take a section.

highlighting menu items when clicked. collapsing questions and answers on the static content help sections.

removed unused help haml templates.

put locales back to how they were and wrote a small js parser to swap in links to help views which have generated links in them.

using locales text for help section headers.

Started converting the help section into a backbone view. Things missing are: some urls which were calculated and inserted into the yml, all the pre-existing erb templates are still there, it's still at /faq/faq, nothing has been tested, some of the questions don't collapse and expand.

changed the locales to have the hard coded urls in them because they can no longer be calculated server side. this is pretty crap because i'm going to have to change it for all the languages now so i might change my mind about this later.

deleted some unused views.