Elevator pitch for app

What does this app do?  It lets people use their computer keyboards to play customized musical keyboards
What, exactly, is our process?

It is this
Update README.md
What does our database look like?

Added database schema and some explanation of why the relationships are what they are
What are the waveforms?

Waveforms how a tone 'sounds.' Each of these take a particular note and makes it sound like it was coming out of a different electronic instrument.
Merge pull request #3 from cnocon/TLR-databaseschema-in-readme

Tlr databaseschema in readme