* Improve tests
This PR adds some necessary tests, fixes the naming on describe
(everything was set to RandomKeyGenerator, perhaps a copy/paste
exception) and fixes the consonant/vowel alternation test, since it was
failing if the keyspace started with a vowel.
* Remove unecessary file
- Upgrade mocha
- Remove should due to limited usage and old style (at least by rspec standards)
- Move spec -> test which is the default
- Update tests accordingly for the above