Beta 0.1.3 for x86_64

First successful build of CMLFS! Clang+LLVM are the main system toolchain with GCC+GNU-Binutils as secondary toolchain in /opt/gnu. GMP, MPFR, and MPC were installed in /opt/gnu. In next release, all three will probably be installed in /usr instead.

LLVM's lld is the system default linker and ld.bfd and ld.gold are available in /opt/gnu/bin

Userland is built, but not the kernel yet.