Polylx

* csd_plot() is interactive only from terminal
* contact_frequency() bug fix

* fiona added to dependencies
* csd_plot after Peterson 1996 added
* contact_frequency Grains method added
* utils.circstat provides most common circular statistics
suitable for pandas agg

* from_coords method added to Boundary
* added eap and epa Grain methods
* surfor for Grains normalized by factor 2
* vertex_angles property added
* ortensor added to utils
* agg accepts kwargs allowing define names of aggregated columns

* shapelysmooth methods added for smoothing
* shapely and scipy upstream fixes
* jenks and quantile rules fix
* bcov shape_method added for eigenanalysis of decomposed geometry

* upstream fix for networkX 3
* Fracnet.from_boundaries bug fixed

* upstream fix for shapely 3
* topological analyses added to Fracnet