Update Copyright to 2013

Signed-off-by: John McCutchan <john@johnmccutchan.com>
An improved README.md

Signed-off-by: John McCutchan <john@johnmccutchan.com>
Copyright update.

Signed-off-by: John McCutchan <john@johnmccutchan.com>
Support sub packs.

Signed-off-by: John McCutchan <john@johnmccutchan.com>