Create RedBlackTree.hs
Create RedBlackTree.hs

Add a Haskell version of RedBlackTree
bixuanzju/fcore,zhiyuanshi/fcore,zhiyuanshi/fcore,zhiyuanshi/fcore,hkuplg/fcore,bixuanzju/fcore,hkuplg/fcore,hkuplg/fcore,bixuanzju/fcore