Tweak exercises per ongoing feedback in class
Flesh out phrase test
Rewrite basic hashes tests
Add first hash-with-arrays exercise
Add hashes-with-hashes exercises
Add some hash aggregate exercises
Add some exercises from exercism
Update README. Kind of.
Rename. Because I can't count.
Rename f'reals. Because I still can't count.
Fix typo
Tweak hash 1 tests
Fix hashes 3
Fix scope in hashes 2
Fix scrabble tests