SASS

Mostly just converted the existing CSS to SASS. The menus have been slightly revamped to be more consistent (all are unordered lists instead of the sub menus being unordered list instead of one being made of divs and stuff).

Header/menus slightly refreshed in look, though it's just some extra padding and whatnot. Login page has been refreshed a bit. Redesign will be done later. A lot of restructuring is still needed, especially to remove the unnecessary floats for columns everywhere.

Commits also include some general code cleanup here and there. The code for alternating background colours for the code viewer is tweaked to simply use `nth-child(odd)` CSS instead of a specific class for it, which was added/removed in JS (this is much simpler/efficient).

Sorry about the massive amount of changes.