Odm2datamodels

Minor version release with update to docstring and better defaults for ODM2Engine.read_query method.
See PR 7

**Docstrings:**
* Add docstrings to public methods of ODM2Engine class

**'read_query' defaults:**
* Updates default output_format to 'dict' (previously 'json')**
* Add new optional argument orient to better control output formatting

Summary
Minor release to fix documentation issues on pypi and address compatibility of Enum output_format argument.

Change Log
* Fixes markdown readme not being properly rendered on pypi
* Replaced ENUM OutputFormat arguments with string equivalents

Initial release of ODM2.1 object relational models (ORM) data models. These data models were developed for support of several other portions of our codebase and were abstracted into their own package so that we can better manage updates between applications and other packages.