Change requirements to refer to a specific maker-py, version to 0.1.3.

Version 0.1.3 is what we've been referring to all along.
The maker-py commit is the one I -think- corresponds
to the specific version we want, it's when the version bump happens in
maker-py.
Merge pull request #1 from Basis/chase-bump

Change requirements to refer to a specific maker-py, version to 0.1.3.