Updated top.owl to rename concepts from 'OntologyXxx' to 'VOXxx', including renaming OntologyLanguage to VOExpressivity (and creating new subclasses), cleaned up annotation properties (moving notes under comment), added and updated some individuals.
Merge pull request #24 from AndreaWesterinen/master

Updated top.owl to rename concepts from 'OntologyXxx' to 'VOXxx', including renaming OntologyLanguage to VOExpressivity (and creating new subclasses), cleaned up annotation properties (moving notes under comment), added and updated some individuals.

This closes issues #15, #16 and #24.