Replace pypi version badge badge.fury.io -> img.shields.io badge was blocked by privacy badger due to third party cookie. Replace with one that doesn't use cookies. Also add some other badges I may want to implement: supported python versions licenses used status beta, stable etc. mozilla observatory

Babel
Jinja2
MarkupSafe
Pygments
alabaster
certifi
charset-normalizer
docutils
idna
imagesize
packaging
pyparsing
requests
six
snowballstemmer
sphinxcontrib-serializinghtml
sphinxcontrib-websupport
urllib3