compatibility adjustments to the code
remote server configuration
changed plot_cells_generic to accept a `alphas` kwarg
Merge branch 'gandi-server' of github.com:glyg/leg-joint

Conflicts:
	leg_joint/epithelium.py
	leg_joint/graph_representation.py
	leg_joint/objects.py
	notebooks/8 - Parameters exploration.ipynb
	notebooks/latest.ipynb
	notebooks/nb_init.py