[JRO] Split production & staging & clean-up asset pipeline

* Add staging environment
* Clean up asset pipeline
* move head.js into asset pipeline
* remove sass initializer
* Update to 1.9 hash syntax

In config/application.rb:

* Test::Unit rail tie not needed so requiring 'rails/all' is unnecessary
* Remove comments
* No need for weird spork hack anymore

In config/environments/*.rb:

* No idea why dev.rb had that weird require_dependency thing. What was this for?
* Make each as close to one another as possible.
* Rack::CanonicalHost is not used in this branch
[JRO] Ripping out theme support

Not used at all. This should probably be its own white-label / theme
gem instead of built into any particular app.