yagarto patches

- scripts based on yagarto for OS X (20121222)
- had to revert back to gmp-5.0.4 + mpfr-2.4.2 to get it to build on 64 bit (Ubuntu 1310)

	modified:   00-set-env.sh
	modified:   01-build-expat.sh
	new file:   02-build-zlib.sh
	renamed:    02-build-gmp.sh -> 03-build-gmp.sh
	renamed:    03-build-mpfr.sh -> 04-build-mpfr.sh
	renamed:    04-build-mpc.sh -> 05-build-mpc.sh
	renamed:    05-build-binutils.sh -> 06-build-binutils.sh
	renamed:    06-build-bootgcc.sh -> 07-build-bootgcc.sh
	renamed:    07-build-newlib.sh -> 08-build-newlib.sh
	renamed:    08-build-gcc.sh -> 09-build-gcc.sh
	renamed:    09-build-gdb.sh -> 10-build-gdb.sh
	renamed:    10-strip.sh -> 11-strip.sh
	new file:   12-build-pdf.sh
	deleted:    README
	new file:   README.md
	modified:   _create-scripts-archive.sh
	modified:   _env-only.sh
	modified:   auto.sh
	modified:   clean.sh
	deleted:    download/README.TXT
	new file:   download/README.md
	new file:   patches/binutils-2.24.patch
	new file:   patches/gcc-4.8.2.patch
	new file:   patches/newlib-1.20.0.patch
	new file:   patches/newlib-2.1.0.patch
	modified:   xx-build-all.sh
	modified:   xx-restart.sh