This version brings the following features:

• 2.5D volume computation between one cloud and a plane or between two clouds (see test023.py)
• computation of several geometrical properties on a cloud (see test024.py)
• raster transformation of a Cloud , to cloud or mesh, Geotiff export (see test025.py)
• update cloudCompare version on master branch.

Corresponding git tag 'CloudComPy_master_20211019'.