don't distribute policy.json and environ yaml files

Since we're not changing these files in chef anyway, we can just rely on
the ones coming with the source.
Replaced all license headers with unified layout
Merge pull request #75 from tboerger/feature/license-header

Replaced all license headers with unified layout
Merge pull request #72 from mapleoin/no-policy-json

don't distribute the policy and environment files with chef