Added time complexity to LazyList XML doc
LazyList missing try

tryHead
tryTail
tryTake
trySkip
LazyList.mapAccum

moved from extensions module to LazyList module
added missing unit test
LazyList.uncons

uncons
TryUncons
unit tests
marked get obsolete
added readme to collections folder
LazyList remove obsolete methods and properties

no sense in keeping obsolete properties in collection that is new to
FSharpx
LazyList add members to type
Merge pull request #191 from jackfoxy/master

LazyList made compliant with FSharpx.Collections standards
Merge branch 'master' of github.com:fsharp/fsharpx into OptimizedSeq