Fix some Py2 traces and bump version 

Restrict Py version, relax ASE version, polish minorly, bump v0.23 

Bump version & update classifier 

Bump version 

Merge branch 'master' of https://github.com/mpds-io/python-api-client 

Fix *verbose* arg 

0.0.17 

Distinguish peer-reviewed and machine-learning MPDS data 

v0.0.15: minor update 

Bump version