~~~~~~
Changes:
* Dropped LiteralProxies finally. Processing of literals is no longer done through a LiteralProxy class (thanks :code:`wrobell`)
* As a consequence:
* The change improves performance of the library by about 14%.
* Related blocks of code, which swallow exceptions are removed.
* Unit tests for the following OWL 2 RL rules are implemented
cax-dw,
cls-avf,
cls-maxc1,
cls-maxc2,
cls-maxqc1,
cls-maxqc2,
cls-maxqc3,
cls-maxqc4
* Unit tests for RDFS closure implemented
adding datatype axioms,
one time rules
* Unit tests for OWL 2 RL extras closure implemented
one time rules