only consider real CASL mixfix identifiers git-svn-id: https://svn-agbkb.informatik.uni-bremen.de/Hets/trunk@5333 cec4b9c1-7d33-0410-9eda-942365e851bb
improved filtering for predicates git-svn-id: https://svn-agbkb.informatik.uni-bremen.de/Hets/trunk@1426 cec4b9c1-7d33-0410-9eda-942365e851bb
moved CASL tests in test subdirectory git-svn-id: https://svn-agbkb.informatik.uni-bremen.de/Hets/trunk@1348 cec4b9c1-7d33-0410-9eda-942365e851bb