Update all version references to 0.2.0, this branch will work on this version.
closes #5. Added PROV-O to the imports of the ontology.
Added the jena library as an external dependency.
Closes #5. Added log4j as testing resource and added test for PROV-O testing.
Added tests for validity and cleanliness of the ontology.
Added comment for testcase
Closes #6. Added a check to see if every class has a definition.