Switch USBDP/USBDM.

When switching out USB parts, didn't catch the fact that D+ and
D- had switched positions as well.
Add non-commercial part to license.

The upstream designs (Rob Seward's / Aaron Logue's) are both released
under a non-commercial license, and this must be respected.
Merge branch 'master' of tyrfingr.is:projects/havoc-board