Source file extension changes (cc to cpp)

[abs1nth]

good! ;-)
while you are at it, how about removing unused files like sound.cpp.openal/fmod?

>Just wanted to let everyone know for other build setups etc.
thx.

i'm trying to get trunk running on Mac OS X again now, a few notes:

• it seems changes like "GL_MAX_DRAW_BUFFERS" require Mac OS X 10.4 instead of 10.3 (at least i couldn't get it to compile against the 10.3. SDK in my limited trying yesterday). if you think this is a bad problem speak up now, since i don't - by the time we do our next release, 10.5 will just around the corner and Apple will end support for 10.3.

• are you sure there were no errors merging the branch to trunk? it seems to me like some of the precompiled header changes were lost, but i can't verify it now since svnweb is down. (likely i'm just confused, though, end everything is fine

• i just wanted to commit some fixes but i can't seem to authenticate anymore...

• i have some problems producing a universal binary and especially an proper "framework" out of ODE, but more importantly right now coplanar_tri_tri() from utility.cpp collides with the one from ODE...how should i handle that? also is it ok to use ODE 0.8?