Insteon Diagnostics

Adds two routines that can be used to test the insteon network.  Should be used in connection with the Insteon Message Statistics pull request.

 - Converts the Ping routine into the real ping routine.  This sends a request to each device (extended to i2 devices) which the devices then acks back.

- Stress Test - This routine requests a single ALDB entry from each device.

Both routines can be set to repeat themselves as many times as desired.  Two voice commands can be added to the PLM to allow the scanning of all devices in the network.