Fix Potree polygon clipping

10x volume calculations, base surface definitions. fix 3D vertical area measurements

Allow display of 2D maps which have only a DSM

Cancel upload improvements, automatic task cleanup, configurable doc links

Catch piexif.dump exceptions

Removed TGI plant health equation

I realised the TGI equation may be erroneous thsu I removed it. I am surprised that no one questioned it before so hopefully it was not used much.

Looks like the plugins directory changed from /plugins at some point to /coreplugins so this is a simple update to a few links in the readme.

Fix paginator overflow

Adds support for automatically selecting the proper band filter