Adding documentation for avl-tree/List
All the avl-tree constructors now return their argument unmodified if it's already the correct type
Fixing a bug with the SortedDict and SortedSet constructors
Adding documentation for SortedDict
Adding in documentation for Dict
Adding in documentation for Set and SortedSet
Adding documentation for equal and toJS
Renaming sjs:collection/avl-tree to sjs:collection/immutable