Config Cleanup and BBOT 2.0 Documentation

[TheTechromancer]

DOCS TODO:

• [x] Presets table
• [x] Clean up + comment presets
• [x] README (including preset snippets)
• [x] How to write a module (including how to run tests)

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 95.13889% with 7 lines in your changes are missing coverage. Please review.

Project coverage is 92%. Comparing base (325d2ed) to head (b5d280b). Report is 29 commits behind head on bbot-2.0.

Files	Patch %	Lines
bbot/core/engine.py	79%	7 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## bbot-2.0 #1419 +/- ## ======================================== + Coverage 92% 92% +1% ======================================== Files 340 340 Lines 23295 23322 +27 ======================================== + Hits 21370 21399 +29 + Misses 1925 1923 -2 ```

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