Velocity implemented

All pages changed by velocity. List and code in browse, source and
mystuff no longer loaded by AJAX. browse.js and mystuff.js now useless
along with half of backend. Major refactoring planned for next week. 

Templates for most used elements.

Now able to get cookies directly from request without JS. Logged in user
can see his name in top bar. Login button JS not changed.

Including only the CSS that the Highlighter needs.

Source.html fix: you can put anything as ID and it won't break.

NOTE: edit function broken as I'm no JS master. Something for @sander242
to fix.

I really need to get a life.