Fix haskey for PersistentHashMap (#50)

Merge pull request #43 from rdeits/rd/iterate

update to new Base.iterate protocol

Merge pull request #35 from TotalVerb/fw/v0.6

Update for v0.6

Merge pull request #31 from JuliaLang/mbauman-patch-1

`size` must return a tuple

Merge pull request #29 from felixrehren/master

RFC: syntax update

FunctionalCollections v0.2.0 [4feaf2d]

FunctionalCollections v0.1.3 [7d94893]

FunctionalCollections v0.1.2 [19c4e29]

FunctionalCollections v0.1.1 [b38338a]