Data.IntMap/Set fixes and testsuite for collections.

Hello folks, Could fptools maintainers apply the attached patch (or give me cvs access, at your convenience ;) which fixes Int* collections? Also, I've written a beginning of a testsuite for collections types. The basic idea is that test-code for multiple modules/types is generated from a signle haskell source by a simple pre-processing phase. This allows to circumvent the current lack of a class framework, and is also somewhat more flexible. Do you think this should be integrated to the ghc testsuite? (Does the preprocessing model fit it?) Cheers, JP.