@hackage multimap1.2.1

A multimap.

This is a simple implementation of a multimap, based on Data.Map.

v1.1
! had its arguments flipped. Fixed. Also added fromMap.
v1.2
Added Data.SetMap, renamed Multimap to Data.MultiMap. Fixed the type of delete. Derive instances for Data and Typeable.
v1.2.1
Fixed typos in the documentation.