Bump to GitHub.
.svnignore: Ignore more files.
Makefile (clean-mingw32): Clean files from Mingw32 release build.
Provide MinGW32 binaries at SourceForge.
Support -log=FILE for the LOG_XXX commands.
Support -stdout=FILE, -stderr=FILE and -stdin=FILE.
Move more syscall 21 misc handling to host.c.
Support [u]int32_t syscalls for mul, div and mod.
Support fixed-point to float conversions.
