Remove obsolete, broken pyandoc usage

[jikamens]

Pyandoc is no longer supported, and the final version of it on PyPI is incompatible with how our setup.py was using it. This commit removes pyandoc entirely and lets Python's setuptools handle the README conversion from Markdown as needed.

[openedx-webhooks]

Thanks for the pull request, @jikamens!

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[feanil]

Generally looks good and is probably good to merge and release once the version is bumped and the CLA is signed.

[feanil]

This generally looks good. @jikamens can you bump this version as well so we can do a new release?

[e0d]

@jikamens I was curious if you are using the Open edX platform or just our fork of MongoDBProxy?

[e0d]

@openedx/cla-checker

[jikamens]

@jikamens I was curious if you are using the Open edX platform or just our fork of MongoDBProxy?

Just using MongoDBProxy.