Tracking topics

[missaugustina]

We should have a central place to track what topics study groups or book clubs are doing. This way groups can avoid unintentional overlap and also gives members a directory of what the study group/s are doing.

[missaugustina]

Update this issue with the ideas for how to track the study group topics. If changes need to be made to this repo (documentation added, a link, or we decide to do the tracking here) then mention this issue in that commit.