Add .gitignore

Signed-off-by: Christopher Larson <chris_larson@mentor.com>
Add dot-to-recipes script used by the other scripts

This is a small script used to take a .dot from bitbake -g and produce
a linearized list of recipes, in rough build order.

Signed-off-by: Christopher Larson <chris_larson@mentor.com>
Add scripts and TODO from my gist, and update the README

Signed-off-by: Christopher Larson <chris_larson@mentor.com>