Point-cloud-utils

Add `pcu.adjacency_list`

Add function to delete vertices from a mesh and update faces accordingly

Bump version in setup.py

Fix ply export to work with meshlab. Update docs

Remove all GPL dependencies and change to MIT license

Update NumpyEigen to latest version.
Functions for creating primitive meshes:
- cube
- sphere
- cylinder

Change voxelize mesh to have the voxel center at the origin

Merge bugfix with downsampling with attributes. Thanks davidcaron !