Bump sesame to 2.7.0-beta2
avoid using checkstyle on eclipse files
extract default XMLReader functionality in SaxSource
catch SAXException that may now occur from SaxSource
add test that fails into error message
remove RDFaFormat as RDFA constant is now in RDFFormat
remove RdfaParserConfig as it is not needed anymore
remove reference to RdfaFormat from SesameRDFaParserFactory
add parser settings specific to Semargl/RDFa

These will be transferred to Rio in the future to support
interoperability
modify SesameRDFaParser to support the new settings methodology
convert SesameRdfaReaderTest to work with the new SemarglParserSettings
call refreshSettings after setting blank node preservation setting