added new platforms: ucprotonb and ucbase

I'd like to add two new platforms to tinyos:

UCMote Proton B/Proton DRD B:
http://www.ucmote.com/en/products/1/24/ucmote-proton-drd
http://www.ucmote.com/en/products/1/26/ucmote-proton
UCMote Base:
http://www.ucmote.com/en/products/1/22/ucmote-proton-base (the page is a bit outdated, we slightly modify the mote: different case, different usb bridge)

The platforms are quite mature (in fact, they're more mature than the mini was when we pushed it). However, I don't know the official way to add a new platfom, and I don't like if this would seem as an advirtisment.