Upgraded legato API.
- Added notes on some difficulties I ran into with the current build system.
- Now imports the generated legato scripts into the mock application.
- Upgraded legato to 0.2.5
- Small refactor to message middleware to prep for next stage.
- Added the ability to configure the available mock midi hosts through the debug panel.
- Commented out one failing protractor test until I have time to figure out why it's broken.