improved weekly_user_stats in admin with a dropdown box by week to list all new users of that week also a link_to the user profile so the admin can sent welcome msgs, etc

This reverts commit 061badf7.

oembed video thumb [oh yeah]

Legacy browser support

Added localized text in comment view

Improve mobile sign up and sign in view [ci skip]

Added localized text in getting started view [ci skip]

totally gross js load order problem.. make the widget system fire after the backbone app to get the notification and search autocomplete back

fix for #2770

Fix #2974, markdown headers now different from headers in post [ci skip]

made the "loader" gif background for oembed container
make videos autoplay after click

disable superscripts on server-side markdownify, since they are disabled...[ci skip]

#2823 fix unlike and unfollow update 

Fix to allow white spaces in Rails.root path for the integration rake task [ci skip]

AHHHH refactor attack_vectors_spec; hopefully it now borders on understandiablity.  this deffy needs another pass from another human, as I had to make tons of spec helper methods to make the crazy setup make sense, but I think we are bordering on something that would let us write new tests in a sane way. whether all of these tests now make sense to test in the first place, that is another question all togther, as it was outside the scope of this refactor

thanks @mperham! see: http://t.co/Jyt7vV4I

Safari 4.1.3 cited the closing params tag as being an unmatched tag.
Changing the paragraph to a div causes the error to disappear.