added visitorEx to OWLNamedObject, added @Nonnull annotations
nonnull warnings removed for tools
cleanup for null warnings on profile
fixed bug in guessed declarations update
centralised and uniformed sax parser factories
cleaned nonnull warnings for builders
warnings cleanup for contract test
warnings cleanup for contract main
warnings cleanup for apibinding
warnings cleanup for fixers test
warnings cleanup for rio
warnings cleanup for api test
first warning cleanup for oboformat
warnings cleanup for impl
warnings cleanup for parsers
warnings cleanup for tools
warnings cleanup for api.change
warnings cleanup for api.io
warnings cleanup for api.model
warnings cleanup for api.profiles