Mingw-w64 Upgrade

• support USER_LIBS Make var
• custom per-target CFLAGS/LDFLAGS
• implemented WorkQueue
• build toolchain tarball
• enable/disable interrupts intrinsics

Fixed EASTL build error caused by missing resource compiler aka windres.

Fixed EASTL build error caused by missing resource compiler aka windres.

• CI: added Github Actions, Gitlab pipeline badges, fixed Circle CI build
• Documentation: more useful(?) information

Switched to mingw-w64-build-ng and HOSTCC build support.

1.1

Switched to mingw-w64-build-ng and HOSTCC build support.

First stable release.

1.0

First stable release.