Various fixes and tweaks to permit a gateway to request signatures from nodes. The following messages will not be signed (nor verified): * All signing-related handshake messages * All ID-related handshake messages * All ACKs An important change is that the polarity for the signing request flags stored in EEPROM has changed. '0' now means signing required. This ensures that if the "ClearEepromConfig" sketch is executed, signing requests will be turned off by default. As a consequence, it is recommended to clear EEPROM if signing will be used to ensure all nodes default to a non-signing state.
For information on installing libraries, see: http://arduino.cc/en/Guide/Libraries