Move numerator and denominator into clojure.next
Begin implementing LazySeq
Implement IMeat for LazySeq
Merge pull request #40 from patrickgombert/lazy-seq

Begin implementing LazySeq
Add count to LazySeq
Merge pull request #39 from patrickgombert/move-ratio-into-next

Move numerator and denominator into clojure.next
Merge pull request #41 from patrickgombert/count-lazy-seq

Add count to LazySeq
Lock when calling seq on a LazySeq
Merge pull request #42 from patrickgombert/lock-lazy-seq

Lock when calling seq on a LazySeq
Begin to implement cons
Merge pull request #43 from patrickgombert/cons

Begin to implement cons
added protocols for persistent vector
added nth
started persistent vector
added assoc-n to persistent vector
added assoc to perisistent vector