added FSharpx.Collections.Queue
added FSharpx.Collections.DList
added FSharpx.Collections.Vector
rename Queue.snoc to Queue.conj
added FSharpx.Collections.Deque
rename DList.snoc to DList.conj
added FSharpx.Collections.Heap and PriorityQueue
added FSharpx.Collections.RandomAccessList
Vector added rev, tryNth, tryUpdate
corrected inputs to DListTest
added deep test for RAL tryUpdate
DList structural equality, monoid test
structural equality

deque
heap
queue
randomaccesslist
vector
added Heap rev
documentation changes
Merge pull request #198 from jackfoxy/master

new data structures in FSharpx.Collections