issue-65 PomdpXReader Class r=ankurankan
added the test pomdpx xml file
PomdpX Reader Class
removed assertOrdedDictEqual function
minor correction in tests
Merge pull request #149 from abinashpanda/dev

Updated documentation for new classes and methods
Merge pull request #150 from abinashpanda/dev

added sphinx to readthedocs-requirement-pip.txt
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
Added the classes for UndirectedGraphs (added general graph functionalities on top of nx.Graph) and JunctionTree
PEP style conventions. Used standard functions for max cardinality search. Test files and graphs
PEP in test_files and more test cases
Added some extra functions in pgmpy/Factor/Factor.py for use in MarkovModels
Markov Model code. Copied from BayesianModel and changed the interface. Correcting the documentation and test cases remain
added __init__ to tests and corrected replaced assertOrderedDictEqual with assertEqual
Merge pull request #153 from ankurankan/dev

added __init__ to tests and corrected replaced assertOrderedDictEqual wi...