Warzone 2100 Graphic Mods tools

new textures and structures for: derrick, powerplant, research facility (still needs some tweakings)

WMIT: Kill second no-rtti flag.

Fixes to build on opensuse.
Remove -no-rtti flag from Makefile.
Kill warning about empty for loop in Mesh.cpp.

Copy the berg-exp branch for remotehorst

adding changed files per safety)ff direction to wmit

added contributors

adding new bombard mortar

Fixing images size

editing mortar textures

adjusting pepperpot mortar