new version hardware node version 2 in prototyping.... (with photos)

[openwsn]

new node (version 3) in prototyping....
refer to the photo attached in this group.

main features:
- integrate cc2420 and arm together into one board. and shrink to 29 *
60 mm (more smaller than previous version)
- module design. flexible to be integrated into products
- robust for industry applications (design improvement)
- mini usb support
- 32pin extension interface. while the first 16 pins are compatible
with the old 16 pin specfication.
this version adopt 2.54mm standard connectors rather than the 2mm in
the past.