Cheat sheet

This app is really cool.

But i'd like to add one thing.
I'd like to have a simple cheetsheet.

Since there is multiple rendering option (different flavor of markdown), it will be nice to have a cheat sheep for each of one of theses flavors.

Keep going guys/girls your making a great job

No file, test, or entry point is named. First identify the supported Markdown rendering flavors and where the project’s documentation lives, then confirm the cheat sheets cover each flavor and are accessible to users.

Written by the indexing model from the issue text.