Hardware button pattern and instrument editing

[Google Code Exporter]

In order to provide the capability of a faster workflow, currently unused 
buttons and button combinations can be assigned to functions that will allow 
users to edit patterns and instruments without needing to use the stylus. This 
has been incredibly successful with LittleSoundDj and would be a significant 
improvement to NitroTracker.

I would suggest having the screen swap effect the button focus. Thus, when a 
view is on the top screen it receives button focus, while being on the button 
screen leaves control to the stylus.

Original issue reported on code.google.com by [e-mail] on 20 Mar 2013 at 1:22