Release 0.5: documentation, new hardware support and ECUManager improvements

* doc: added Getting Started guide
* doc: documented serial protocol
* new memBlock hardware revision 1.1
* new ECU-PCON-mp6quad hardware
* added I2CCONTROLLER command
* ECU: made short form of UUID (8 characters) the default
* ECU: added attribute 'serial_port'
* ECUManger: .get_by_uuid() now uses the short form (8 characters)
* ECUManager: sort found ECUs by their UUID