Allow syncdb for non-nightlybuilds apps
Add release_date to LatestVersion model
Implement /sitemap.xml for NightlyBuilds and Pastebin apps

Introduce StaticSitemap() which reads a Site's URLConf and generates a Sitemap
for all URLs which can be reversed without any arguments.
Major design and layout rework

Based on a template provided by Matthew, this is a major rework of the
whole site to look better and more modern.
This is still work-in-progress.
Drop mobile site code and templates

Instead of using a seperate mobile page, let's make the site design responsive.