Introduces PersistentSortedSet
Add the set function to clojure.lang.persistent-set
Merge pull request #8 from patrickgombert/sorted-set

Sorted set
Add `or` into operators
Switch all instance of and/or/not to use clojure.lang.operators
Merge pull request #9 from patrickgombert/logical-or

Logical or
adds travis file
starts on numbers test suite
Merge pull request #11 from mylesmegyesi/numbers

starts on numbers test suite
Break out comparison namespace
Introduce comparator
Merge pull request #12 from patrickgombert/comparator

Break out comparison namespace
adds more numbers tests for == and numbers
Merge pull request #13 from mylesmegyesi/more-numbers

adds more numbers tests for == and numbers