Remove social toolbar

This will be replaced with something else later
Add bootstrap.min.js to require_main

And deleted old version from lib. There are some conflicts between bootstrap and jquery-ui (understandably), had to put bootstrap before jquery-ui or the tooltips broke.
Update to jquery-1.11.1
Change README extension so it renders as markdown
Add accordion/controls for updates panel (needs work)

There are still some issues with this - the updates panel needs to be
outside the welcome-layout so that it can work on all “pages” but I
don’t understand Marionette well enough to move it (I tried and it
broke the form, I know that won’t be there forever but I still don’t
want to break it :)
Misc formatting/cleanup