Replace inadvertently-removed deprecations
doh
dependencies for 2.6/2.5
PyRdfa parser: updated the initial context with the new prefixes: rr, sd, prov, dc11
PyRdfa parser: updated the initial context with the new prefixes: rr, sd, prov, dc11 (trying the push again)
minor cleanup - some docstrings
reset flags after test for sparql tests
integrated xml/html literal code into normal literal class
merged master
removed code to support 2.4