to_solver_based_model anticipates a solver_interface (like optlang.glpk_interface now)
cobrapy reactions are now cloned (to be solver_based_model.Reaction) in model.add_reactions
Merge remote-tracking branch 'origin/joao' into devel
Updated to sympy==0.7.5 (and travis-ci preparations)
Updated README.md
Trigger travis
travis
Merge branch 'devel' into joao

Conflicts:
	requirements.txt