Add an AssetPipelineProvider for non-precompiled assets
Add support for the asset pipeline

We finally have a full green test suite with all Rails versions
working. :-)
Reduce bad duplication in tests
A first pass on Roadie::Rails::Automatic #irresponsibleruby

It's a bit irresponsible since I'm not sure about the approach, I'm
missing integration tests and I actullay drove the tests from the
implementation here.

I'm committing anyway since I have to sign out now, and I want to
preserve this solution so I can build upon it instead of just forgetting
how I did it.

Does this actually work? I really don't know right now. I think it
*should*, but again: I have no real integration test for it.
At the minimum, the code needs to be formatted better for readability
and the private module down there is getting really nested right now.
Perhaps it should be promoted to a public class one level up..?