fix get-in behavior
resolve test-stdlib merge conflict
Merge pull request #77 from stuarth/fix-get-in

fix get-in behavior
Added macro? function
Merge pull request #79 from thomasmulvaney/macro-predicate

Added macro? function
empty? and not-empty? tests for collections
Update to run tests and examples
Merge pull request #82 from gigasquid/master

Adding empty? and not-empty?
Make Bool, PersistentHashSet and PersistentHashMap hashable.
Make characters hashable
Make EmptyList and PersistentHashMap hashable
HashCollisionNodes now work
Added tests for collisions.
Merge pull request #83 from thomasmulvaney/persistent-hash-work

Persistent hash work
Added disj to PersistentHashSet
Merge pull request #84 from thomasmulvaney/disj

Added disj to PersistentHashSet
merge branch 'master' into destructuring