Updated the TMS code. To be used with RDF_AXIOM...

* [OWL_BUILD,DOC] Added predicate documentation headers.
* [RDF_AXIOM,DOC] Added predicate documentation headers.
* [RDF_AXIOM,SC] Removed axiom/4 from the exported predicates list.
* [RDF_SEARCH,FIX] Added missing module import.
* [TMS_EXPORT,NEW] Rewrite, using the GraphViz support modules.
* [TMS_TEST,SC] Test predicates extracted from module TMS.
* [XSD_DECIMAL,FIX] Regression due to previous fix.