redding/dassets — pull request #57 by kellyredding (2013-08-07 21:02:23+00:00)
Title: have the config know whether a digest path is a combo or not

This will be used in the upcoming recursive combinations feature.
I need to know if a given path is a combo or not to know if I need
to keep recursively processing the digest path or break the recursion
and treat it as a "null source".

@jcredding this is in prep for recursive combos - ready for review.