- added "--icc" Premake flag, to disable PCH and set different warning
flags
- added required headers
- changed debug_warn to not generate constant-expression-in-conditional
warnings
- changed FAM popup-warning into a log message, so it's not so
irritating
- Atlas: pass around wxGLCanvas instead of wxGLContext, because the
context is sometimes just NULL
This was SVN commit r4733.