Redmine

This is a quick patch to make the project selection a javascript dropdown.This is inspired a bit by http://guides.rubyonrails.org, and how they've laid out the guide index.

This is more a proof-of-concept than anything, as there are still a few things to do to make this "production-ready".

1. Convert this from jQuery to Prototype, seeing as there's no jQuery being used in Redmine (afaik)
2. move the initialization block from the base.rhtml file to an included javascript file
3. clean up the display a bit so it's "prettier"