Navbar 2.0

base.html: Implementing a new and improved navbar design which solves
several issues present in the old one. It also looks cleaner on mobile.
collapse: renaming as base.js
base.js: adding jquery needed for the navbar.
base.css: adding custom css needed for the navbar.
Navbar quickfix

Changing the responsibility for making the inner nav position:fixed
from css to jquery to prevent size issue.
Navbar positioning

Updating base.js to set navbar positioning to the correct value on
window load.
Merge branch 'master' into erich_dev
Merge branch 'erich_dev'