further evolution of a Haskell/Frege programmer
Merge branch 'master' into issue80
eliminate pattern match warnings
eliminate warnings and hints
make it possible to suppress 'is supposed to be constant' warning
supress warning concerning INHERIT/PIPE
supress warning concerning standard in/out
remove unused imports
solve issue#80
Merge pull request #90 from Frege/issue80

Solve issue#80 and some other minor quirks.