0.3 - Choice over number of chords in progression, and addition of altered!

Hey all! So I was able to add a couple more features, and wanted to break them down here.

1st off, I added the ability to change how many chords are in the progression that is generated, from 2-16.  This way you can choose to have a really long elaborate chord progression, or a very simple 2 chord vamp.

2nd, I added the altered mode, but based off the 5th degree.  This decision took a lot of thought.  Every other mode is based off the root, ie parallel modes, but altered is typically used to form an altered V chord, so that is why I decided to do it this way.  What that also means is some of the chords are pretty unusual, including a bIaug haha

Also, I kept the default settings as they were, so you have to go into the controls and enable altered, and also to change the length of the chord progression.  Regardless, I hope you enjoy this update!

Next up, I'd love to be able to have a "save" of sorts, to be able to save chord progressions you like, and also a breakdown of the notes in each chord, for those that are unfamiliar.  I'll see when I have time for those.  ;)