-Handle wall and flat texture animation defined in the ANIMATE lump.

git-svn-id: http://odamex.net/svn/root/branches/texmanager@4263 b0bcef46-2027-0410-bd56-ab726e9a1d04
-Add support for animated flats and textures in the ANIMDEF lumps.
-Change TextureManager::mAnimDefs to use std::vector instead of a manually resized array.

git-svn-id: http://odamex.net/svn/root/branches/texmanager@4264 b0bcef46-2027-0410-bd56-ab726e9a1d04
-Handle warped flats and wall textures defined in ANIMDEF lumps.

git-svn-id: http://odamex.net/svn/root/branches/texmanager@4265 b0bcef46-2027-0410-bd56-ab726e9a1d04
-Clean up old, unused animated texture code.

git-svn-id: http://odamex.net/svn/root/branches/texmanager@4266 b0bcef46-2027-0410-bd56-ab726e9a1d04
-Rename side_t::_midtexture to midtexture and likewise for _toptexture and _bottomtexture.

git-svn-id: http://odamex.net/svn/root/branches/texmanager@4267 b0bcef46-2027-0410-bd56-ab726e9a1d04