improve datapackage.json #34
Description
I've added a datapackage.json file as a step toward better documenting the data in this repo.
It would be useful to review the Data Packages spec and make sure the datapackages.json file has everything in it that it ought to.
The current datapackage.json file is the result of running dpm init.
It chooses ODC-PDDL-1.0 as the default license. I'm not familiar with it, so that should be reviewed as well.