Avoid confusing pylint's 'missing-format-attribute'.
Rename '_get_protobuf_attribute_and_value'->'_pb_attr_value'.

Helper, not API;  unused outside 'gcloud.datastore.helpers'.

Removes pylintrc wart.
Annotate base pylintrc.

Generated from 'pylint --generate-rcfile'.

Defaults are commented out.

Exceptions to defaults include a rationale.

Note generation of 'pylintrc_reduced'.
US speling.
Moar speling.
Update 'max-locals' as needed by #364.
Merge pull request #368 from tseaver/annotate_pylintrc_w_defaults_and_rationale

Annotate pylintrc w defaults and rationale