Multitool

Multitool has been tested with and works using both the old single extruder only config style and the new multi extruder config style. TemperatureControl modules can also be linked with their Extruders by giving them the same name in config and setting the temperature_control.<name>.link_to_tool config setting to true. See the updated config file in the ConfigSamples/Smoothieboard directory for an example of how to use the new multi extruder system.