added Searcher methods for collections of ontologies
OWLXML classes made package protected
simplified ImmutableOWLOntologyChangeException
drop BOMSafeJavaCharStream #191
Don't turn uncompressed  owlapi literals into bytes and back again
Merge pull request #193 from sesuncedu/less_bytey_uncompressed_literal_impl

Less bytey uncompressed literal impl
OWLLiteralImpl improvements on memory footprint #190

Added special cases for plain literals and xsd:string literals
warnings removed