Warzone 2100 Graphic Mods tools

Adding new texture and pie files for Vtol Factory
Textures need tuning for tcmask

Changing textures to work with opengl 1.4

warzone2100 trunk r11492

Maximum particles 65536

Bugfix atmos.c asAtmosParts exceeding array bounds, add error checking and also change the way the loop runs.

Bugfix: Fixed segfault relating to ticket number 6

Final change to skybox code.

Change to code to enable day/night

adding new sky textures and mod a building texture.

Don't draw clouds twice
Also work with hours, not seconds.