0.1.1 Add field retrieval support

Changelog:

• Extended support to Django 2.2/3.0
• Extended support to python 3.6/3.7/3.8
• Dropped support to python 3.4/3.5
• Updated Readme.rst
• Adjusted ESModelBinderMixin to dedicated base model ESBoundModel
• Added support to retrieve fields from Queryset/model
• Added support to filter and order on ES searches
• refactored tests
• removed redundant .pyc files
• moved test settings.py into test_app

0.0.1

• Initial Release