Move mobile full-site link to footer

Also remove the Tracks project links from the mobile footer
Add mobile calendar view
Merge pull request #219 from zoombody/mobile-calendar

Add a mobile calendar view
Remove sample SQLite databases

They're out of date, SQLite isn't the default database driver, and
they're not mentioned in the documentation.
Use correct server name in install doc

The builtin web server is WEBrick, not Mongrel.