Adding Notes To Piezo

- Updated notes / octaves available to the Piezo Object.
- Added script piezo-note-scale.js to ./eg/
Updated Notes

- renamed eb to d#
- renamed bb to a#
- updated piezo-note-scale.js to reflect new notes
- updated test/piezo.js to account for new notes
Merge pull request #424 from McDonnellDean/piezo_note_additions

Note Additions For Piezo (For Discussion)