Add Mozilla Persona Omniauth Gem and initializer
Add (ui-only) Persona button to login modal
Add basic Persona functionality

1. No session integration yet, so automatic login/logout events are suppressed.

2. Popup blockers must be disabled: submits form to target="_blank"
Use AJAX for submitting Persona credentials.

Fixes issue with needing to unblock popups.
Make Persona configurable
add basic coding style guidelines to CONTRIBUTING.md
updated Gemfile.lock to take into account the rb-inotify's version bump
better french traduction...

... regarding the minimum entropies
Merge pull request #341 from ZogStriP/patch-1

better french traduction...
Merge pull request #338 from ZogStriP/updated-gemfile-lock

updated Gemfile.lock to take into account the rb-inotify's version bump
Don't double-up on #main-outlet when static content is rendered through Ember
update vagrant documentation

to deal with eventual troubles while downloading the box
added the gear icon to the "Admin" button on the user page
some more extracted strings for translation
Merge pull request #350 from kubabrecka/extract_strings3

some more extracted strings for translation
Merge pull request #347 from ZogStriP/put-a-gear-button-on-it

added the gear icon to the "Admin" button on the user page
Merge pull request #346 from ZogStriP/patch-2

update vagrant documentation
Merge pull request #345 from tms/fatten-up-static-pages

Don't double-up on #main-outlet when static content is preloaded
Merge branch 'persona-integration' of git://github.com/callahad/discourse
Let's default Persona to off right now, change button text