[Feature Request] Speaker notes

[Teddy Xinyuan Chen]

Thank you so much for making this awesome tool!

md2key reduces most of my manual work when creating slides, but I wish I could automate the creation of speaker notes too. Would you consider adding this feature?

[Akira Matsuda]

@tddschn It's already implemented via #28, in the following notation:

## Title
body

^ notes

[Teddy Xinyuan Chen]

Thank you!