- made the "next scripting laguage" a own, loadable tcl package (currently named nx, name is subject of change) - predefined.tcl is now pretty minimal.
- get rid of ":::xotcl::use" - renamed tests based on next from .xotcl to .tcl - extended regression tests - use namespace ::nx::test instead of ::xotcl::test - use namespace ::nx::serializer instead of ::xotcl::serializer