added bootstrap-sass gem v3.1.1
removed vendored bootstrap 2.x assets
fixed asset includes
use var instead of mixin
added meta viewport for mobile
updated login page
migrated page layout and navbar to bootstrap3
updated add host modal
fixed host edit button styles
cleanup
highlight user tab
use bootstrap3 styles for select2
fixed button styles (a -> button)
fixed brand link
migrated host editor modal
migrated profile edit form
migrate profile pages
reduce body padding
migrated new repo form
fixed routing for new check template