first simplifier-rules implemented git-svn-id: https://svn-agbkb.informatik.uni-bremen.de/Hets/trunk@4070 cec4b9c1-7d33-0410-9eda-942365e851bb
translate to Haskell example git-svn-id: https://svn-agbkb.informatik.uni-bremen.de/Hets/trunk@3013 cec4b9c1-7d33-0410-9eda-942365e851bb