Ladme/gorder: gorder v1.3.0

gorder v1.3.0 Changes in version 1.3.0 Faster leaflet assignment for vesicles Implemented a new leaflet classification method, SphericalClustering, exclusively for vesicles. This method classifies lipids using a 2-component Gaussian Mixture Model based on the distances between lipid headgroups and the vesicle center of geometry. This method is much faster than Clustering, but is only usable for systems with a single unilamellar vesicle. See the manual for more details. Analyzing very long trajectories Trajectories longer than 2 147 483 647 simulation steps can be now analyzed.