Update css, js, glyphicons, navbar to bootstrap 3
Update templates to bootstrap3
Update page_setup.js
Use CDNs for CSS, JS
Delete local CSS, JS files

these are retrieved from the CDN instead
Fix form width
Rearrange scripts and use CDN for Less.js
Update forms to bootstrap 3

form-horizontal needs additional helper classes in BS3
update django-competition style to bootstrap 3

nav-tabs -> nav-pills, new icon names
Merge remote-tracking branch 'jon/develop' into bs3update
Add newlines to ends of files
Merge remote-tracking branch 'github/bs3update' into develop