Use sphinx to create viroconweb's documentation similar to viroconcom

[ahaselsteiner]

I'm submitting a ...

• [ ] bug report
• [X] feature request
• [ ] code improvement request

Expected behavior

How should it work (with the bug fixed or the feature implemented)? The procedure should be similar as for viroconcom.

[ahaselsteiner]

Done, the docuementation is now available at: https://ahaselsteiner.github.io/viroconweb/index.html