add ability to map inside ARules, add more freeVars instances
add ability to map inside ARules, add more freeVars instances

darcs-hash:20051002012147-1a7c6-8d6afbed57b0d5e34df820c18deca1c513843d41

kirbyfan64/jhc,kirbyfan64/jhc,kirbyfan64/jhc,kirbyfan64/jhc