Implement number equality
Move bit-count into platform/hash_map
Implement zero?
Implement vary-meta
Pull out meta-functions specific test
Merge pull request #65 from patrickgombert/meta

Meta
Merge pull request #63 from patrickgombert/number-equals

Implement number equality
Remove vary-meta test from persistent-map-test

  Vary-meta is composed of functions from the meta interface. This
  composition is already tested by meta-test.
Implement bit-not
Implement bit-and-not
Merge pull request #66 from patrickgombert/remove-old-test

Remove vary-meta test from persistent-map-test
Merge pull request #67 from patrickgombert/bit-ops

Bit ops
Add bit-ops

  Added bit-shift-right, bit-clear, bit-set, bit-flip & bit-test
Merge pull request #68 from patrickgombert/bit-ops

Add bit-ops
Allow nil to be passed to nth
Merge pull request #69 from patrickgombert/nth-of-nil

Allow nil to be passed to nth
Implement rest
Use EMPTY-LIST when returning the rest of an empty seq
Implement second
Implement number type check boolean functions

  Introduce Protocols for Integer, Decimal & Float