Warzone 2100 Graphic Mods tools

Fix: sound capture was not being stopped properly when max frame count
was exceeded.

Cleanup: remove unused cruft from opeanal_track.

change colour again

Added more comments for code readability.

update field texture

adding frontend0.png change and forcefield colour change

Fade update again

Update fade

Update fade code, turn hit colour back on.

Change to fade code.

invert sphere texture from black to white