Replace almost all texture uses with calls to the new system.
Add some anistropic filtering to terrain textures.
Let Atlas load terrain texture previews partly-asynchronously by
polling.
Fix inefficient texture colour determination for minimap.
Remove unused global g_TerrainModified.
Change GUI texcoord computation to be less efficient but to cope with
dynamic texture changes.
Fix GUI renderer effects leaving bogus colour state.
This was SVN commit r8099.
which is just "class C { void C::f(); }" code, which other compilers
seem to have ignored.
Also removed HAVE_PCH from GCC because our build system doesn't have
PCH. Added necessary headers to make it compile again.
This was SVN commit r4437.
replaced all (*) CStr / CStrW by-value params with const reference. hoo
boy.
please always perform this optimization (actually standard idiom) when
writing the code - it takes little work, tells the next guy that the
string won't be modified, and makes a large performance difference.
(* where possible.. a few require other changes and will follow later)
This was SVN commit r4151.
