[RELEASE] v 2.4.4
[FEATURE] better errormsgs for stackTables
[FIX] fixed import bug in patched_pyper

    it was not a good idea to import a module (in this case traceback)
    in an implementation of __del__ as the interpreter might be shutting
    down in this moment and the module is not found any more.
[FIX] time unit handling
[RELEASE] v 2.5.0