Minor metadata modified on `index.html`
Added a side menu for navigating between internal pages
Added tasks page

Based on content from:
http://blends.debian.org/games/tasks/packagelist
Added "Statistics" page, along with linking it on the other pages
Added link to the Package Tracker
Auto-hiding the navbar when scrolling
Made selected theme persist between pages.

Using jQuery cookie to persist the theme name on
the client side.

Source:
https://github.com/carhartl/jquery-cookie
Added Debian favicon (straight from `debian.org`)
Added "Featured Game" on the home page