OntologyToRulesCompiler still no-where near complete, but moving in the right direction.
Moved RIF parse command into RIFRuleSet object, to mimic Jena Rule.parse()

Implemented classes and interfaces for all parts of RIF rules and linked them to the XML handler ---- UNTESTED
These are less limited than RIF-core itself, as the parsing process restricts the finished objects as necessary, and allows others to express more unrestricted rules as they desire.