Works on macOS

Set ASM_FLAGS for 32-bit building on Mac

Build 32-bit version binaries correctly

Changing OS_ID is not enough.

Support cross-compiling for windows using cmake

When building with TCC, it needs to be a cross-compiler, and
present as ${CMAKE_CURRENT_BINARY_DIR}/cross-tcc

To compile for 64-bit windows:
$mkdir build
$cd build
$cmake ../make -DR3_OS_ID=0.3.40 -DCMAKE_TOOLCHAIN_FILE=../make/Toolchain-cross-mingw64-linux.cmake

Zip r3-core and libtcc1.a for uploading

Set extra compile flags for clang

To eliminate some warnings

Release on tags only

change links to atronix website