Namespaces are RDFXML QName compliant now

refs #185
test for issue #115
added missed fixtures
avoid '/' in local part of QName

refs #115
test for #74
missed fixture
removed dummy test
test for #157
Respect xml:base in root of RDF/XML files

refs #157
changelog
one more test for #115
PSR-4 + Namespaces
updated dependencies
convert test-helper classes to PHP-5.3+ style
tweak class-names in strings
converted HTTP unit-tests to use namespaces
proper registration of literal-classes
namespaced classes for Format, TypeMapper
Converted Literal unit-tests to use namespaces