Assetless chaps

DO NOT MERGE BEFORE TRYING OUT... I have this working for me locally but I want to be sure this works for more than just me before this gets merged.

This fixes a bunch of asset pipeline issues-- and should let us run a server from here or from an app like trusty_blank that uses this and get assets loading. It uses a teeny tiny engine like we discussed in #10.

You'll need to test this out with https://github.com/pgharts/trusty_blank/pull/1 and make sure to recopy+modify the Gemfile.example in your trusty_blank repo, bundle, and use bundle exec.

I had to do a bunch of things including disabling TrustyCms::Cache, installing thin (although installing webrick as a gem might have worked too), installing some weird versions of gems where people claim to have fixed these issues (and it seems like they're right).

I *chose* to do some other things to try and make the assets into officially supported, current things, like switching from sass to scss syntax, getting rid of the config/compass.rb, etc.

I tried to document what I was doing and why in the commit messages, but please let me know if anything looks wrong, like it'll mess something else up, isn't what you want, etc etc etc.