xotcl1.xotcl

- changed assertions: old (xotcl1) interface: 3 methods + 3 info methods * <object> check Options * <object> info check * <object> invar Conditions * <object> info invar * <class> instinvar Conditions * <class> info instinvar
new (xotcl2) interface: 1 cmd (similar to ::xotcl::relation)
::xotcl::assertion check|object-invar|class-invar ?arg?
- added emulation for xotcl1

- deleted namespecific C macros:
isInfoString, isInstinvarString, isInvarString, isInstprocString, isProcString