Add non-higher-kinded typeclasses like Monoid, etc.

[Adam Rosien]

[>>=]

FYI you've been removed from the Thanks list in my book! And replaced with an in-line mention 😛 https://leanpub.com/fpmortals/read#leanpub-auto-summary-3

I've also got an alternative cheatsheet https://leanpub.com/fpmortals/read#leanpub-auto-typeclass-cheatsheet with non-HKT things like Monoid