Make each check for smells a separate spec
Make each check for smells a separate spec

This has three effects:
- Feedback is much nicer, since RSpec will print the offending file name
  as part of the spec description.
- Every file will be checked, regardless of earlier failures in other
  files.
- Each spec takes a lot less time individually, so there's less chance
  of hitting the 5 second spec timeout.

troessner/reek,troessner/reek