Reusing the README file from the Yocto Project Documentation
directory but removed the YP specific content and changed to be
specific to BitBake.
(Bitbake rev: 67b6e9c54676e979c546c0d350b2d01443f13f36)
Signed-off-by: Bill Traynor <wmat@alphatroop.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>