removed assertOrdedDictEqual function
minor correction in tests
Merge branch 'dev' of https://github.com/pgmpy/pgmpy into dev
to_tabular_cpd method incomplete
RuleCPD class
adds cardinality method to get the cardinality of variables
adds to_tabular_cpd method to RuleCPD class [refs #140]
Merge pull request #152 from ankurankan/dev

Addition in TreeCPD and implement RuleCPD