Merge pull request #33 from CarloWood/cw_clang20_1_8

Merge pull request #34 from CarloWood/cw_tests_include

Merge pull request #35 from CarloWood/cw_build_sh

Improve build.sh.

Use quoted include for tests/Common.h.

Fix clang++ (version 20.1.8) compile errors.

cone grid options and deformation of TPointBox

cone example cont'd

cone example

more demos

tangential updates

remove unused build func

update gfx linux cmake

gfx update

boost tweaks