SboTerm class implemented together with branch support

README.md

xbanalysis/model/__init__.py

xbanalysis/model/data/sbo.owl

xbanalysis/model/sbo_term.py

xbanalysis/model/xba_compartment.py

xbanalysis/model/xba_parameter.py

xbanalysis/model/xba_reaction.py

xbanalysis/model/xba_species.py

xbanalysis/problems/fba_problem.py

xbanalysis/problems/gba_problem.py

xbanalysis/problems/lp_problem.py

xbanalysis/problems/rba_problem.py