Small Improvements

[jordangeorge]

This change includes the following changes:

• An important note regarding subgroups/subtopics.
  • I think this is good to have because I didn't know subgroups were basically groups. I thought it wouldn't be possible for me to get events from a subgroup until I just tried on a whim to use the group endpoints for subgroups/topics.
• An updated README.md for accurate linking
• Typo and capitalization corrections for clarity

Also, I've noticed that topics are called subtopics in some places and subgroups in others. What would be the correct language? I know in terms of endpoint paths subgroups might be more correct. But I also see topic as a returned field in GET /groups/:group_id/subgroups/:subgroup_id.

[AlureonTheVirus]

Hey! Thanks a ton! These are useful changes.Regarding your question about subgroups vs subtopics vs topics: As far as I'm aware, the API itself is inconsistent in how it references topics. (It's been a moment, I'm not entirely sure. Someone would have to verify that for me). Obviously the thing to do in the technical docs would be to stick with whatever is most consistent within the API itself — similar to the "guilds" vs "servers" discrepancy in the discord API. Unfortunately I'm unavailable to review and merge PRs right now, but Peter should be here sooner or later. You can also hit other maintainers up in the Groupme group or email me personally at ***@***.***

[jordangeorge]

Hey, @not-so-smart! When will you be available to review this PR? If you're not available please let me know who might be.