Ckit brew refactor

When compiling as a gem, references were not working and ckit brew wouldn't run. This refactor is to get it running as a gem.

- [] Pass tags from thor to filter_run_excluding in rspec_config
- [] Need to decide what the names of test scripts (i.e. _spec.rb) will be and where they live 

Completion is when 'ckit brew' starts the test suite, exits cleanly, and generates output