A simple application which verifies the 6loWPAN stack is functioning
correctly.  A mote running this will respond to ICMP Echo requests
(0x80), and provide a UDP echo service on port 7 (a la rfc862).

To build, use the 'blip' make target extra.  IE, 

$ make <platform> blip ...

For more information on setting up an IPv6 network, please see the tutorial:
http://docs.tinyos.net/index.php/BLIP_Tutorial