Response error handler and class, including docs
Merge branch 'faraday-middleware' into faraday-error-handling

Conflicts:
	lib/rapidash.rb
Use RSpec 2.14rc1 for new expect(foo).to receive(:bar) syntax
ResponseError specs
So many deprecations... running back to rspec 2.8
Merge pull request #1 from paulspringett/faraday-error-handling

Faraday error handling