Corrected test for empty compartment lists in function write_cobra_model_to_sbml_file to allow default compartment lists to be generated when not specified
Grouped together code & comments that deal with compartments in function write_cobra_model_to_sbml_file
move pFBA from oven to mainline
fix revert_to_reversible rxn/met relationship

need to use model.remove_reactions to make sure reaction/metabolite
awareness is updated
relative imports in parsimonious.py

now that it has been moved out of the oven
unit tests and bugfixes for pFBA/make_reversible
Merge pull request #61 from aebrahim/pFBA

Move pFBA from oven to mainline
Merge pull request #60 from afif-elghraoui/master

Minor Bug Fix in write_cobra_model_to_sbml_file to Allow Default Compartments to be created
small doc formatting bugfixes
reran autodoc script
update pickles