SATIE OSC configuration

This MR implements SATIE configuration via OSC message.

First, 4 new OSC messages were added: /satie/configure, /satie/boot, /satie/quit, and /satie/reboot. These last 3 messages where good additions to make in order to complete this new functionality.

Secondly, 2 new methods where added to class Satie: reconfigureFromJsonFile, and reconfigureFromJsonString. The latter is the one used for OSC configuration, the other seems like a good idea to add as well. SatieConfiguration also now has a *fromJsonString method.

API documentation, UnitTests, and some small fixes were added here as well.