Update styling, templates to bootstrap 3

also deleted bootstrap-responsive.min.css - not needed in bootstrap 3
Use CDNs for CSS, JS
Delete local CSS, JS files

these are retrieved from the CDN instead
Fix form width
Restore pygments style

Needed for syntax highlighting when viewing files
Add Less.js CDN and clean up links/scripts a bit
Fix up base.html
Remove less.min.js
Merge remote-tracking branch 'origin/bs3update' into develop
Update interface