Version 1.9.1

This minor version bump fixes a few smaller issues:

• MICrONS & H01 interfaces:
  • fetch_neurons now accepts a materialization parameter that determines which materialization version is used for synapse and nucleus queries; defaults to "auto" which means navis will try to find a materialization version matching the queried root IDs
  • fetch_neurons will now also assign soma positions for H01 neurons (see the .soma_pos neuron property); previously this only worked for MICrONS neurons
  • datastack="cortex65" now points to the correct MICrONS datastack
• CloudVolume.mesh.get_navis (see navis.patch_cloudvolume) now accepts a process (default is False) parameter that determines whether the NeuroGlancer mesh is processed (deduplication of vertices, etc.); contribute by @fcollman
• fixed a bug in navis.subset_neuron that caused branch points to not be re-calculated