Support resolver db 2.0

Merge pull request #68 from golnazads/master

added structures for resolver db 2.0

Bibgroup in Nonbib/Data

Adds bibgroup and bibgroup_facet to nonbib protobuf.

Improved Python2/3 Compatibility

Includes Sergi's changes that run sed to clean-up troublesome Python code generated by protoc.
Dockerfile specifies a new ubuntu.

deprecate rn_citations_hist in metrics protoguf

it is not used and was not in the sql table definition for the metrics service table

Compatible with Python 3 ready celery packages

Bugfix: With Python 3 compatible celery packages, a strange case happens

where the attribute '__setstate__' gets call onto Msg derived objects but
self._data does not exist (although it should since it is setup
in the constructor!)

- Added check to issue an AttributeError when that situation happens

Python 3 compatibility for PyPI

Merge pull request #62 from kelockhart/py3-pypi

Updated for PyPI Python3 compatibility

Compatibility with Python 2 and Python 3

#61 Tested on Python 2.7 and Python 3.7

add aff_raw to augment response message

Merge pull request #60 from spacemansteve/master

add aff_raw field to augment pipeline message

Fix PyPi Rendering Issue

Merge pull request #59 from krisbukovi/pypi_rendering_fix

fix pypi long description rendering error

add facility field to fulltext message

Merge pull request #58 from krisbukovi/modify_facility_name

change name facilities to facility