README.md covers both general information for people using and building
the software, and more specific information for people contributing to
either dtc or libfdt. Split out the latter information into its own file
for easier reference.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Let's move vaguely into the twenty-first century by converting our old
plain text README file to Markdown. While we're updating the formatting,
make some small polish changes to the content.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>