new graphics functions: dom2vec, quiver
new: Polytope.are_inside, polytope.grid_region
implement LtiSysDyn.plot
lift quiver over polytope Polygon patch using zorder
new: Polytope.scale
new grid_region arg: res
new LtiSysDyn.plot arg: show_domain
new: PwaSysDyn.plot
fix usage of _get_patch in abstract.plot
replace polyplot with Polytope.plot
plot PwaSysDyn over evolving partition