- New target platforms (LinuxNoEditor for client+server, LinuxClient for client, Linux for editor, LinuxServer for dedicated server - mirroring other platforms).
- Preliminary support for gcc in the toolchain (and some safe fixes in code).
- No more lowercasing when accessing files on Linux, tread carefully.
- Changes needed for native compilation and other minor improvements.
#codereview Josh.Adams, Michael.Liebenow, Steve.Robbs
[CL 2067133 by Dmitry Rekman in Main branch]
