Added README
Added rspec

Added rspec for testing. This includes a minimal spec_helper and a
sample test spec.
Added pry

Added pry for debugging.
Refactored script into mini-application

Now that the basic commands are in place, the script has been refactored
into a more structured application. This includes

- A DSL for setting up the pedal board
- A command library for defining commands
- Script renamed from test.rb to start.rb
- A simple binary added to start the pedalboard script
Added new commands
Added extra pedals
Updated the README

Updated the README with information on starting and configuring the
script.
Fixed failing specs

The specs were failing as the pedal board due to the UniMIDI dependency
not being stubbed out in the tests.
Added simple pot support
Added logged to pot