Warzone 2100 Graphic Mods tools

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.

Untested changes to skybox to make them alternate between night and day depending on the hour.