Use new download method.

Support 7.2.0

Update README.md

Update README.md

Add dxe.ld patch.

Add patch for "dxe3gen does not handle relocs > 65535"

See :
andrewwutw#14 (comment)
https://groups.google.com/forum/#!topic/comp.os.msdos.djgpp/VOyJcUMYqOE

Remove unused patch file.

GCC 6.3.0 : Build DXE tools.

Support 6.3.0

Fix 5.4.0 binutils 2.26 file link.