add hw_universal in attempt to fix pwm devicetree oddities
Enable hw_universal

* Found bugs in pinMode in that it assumed asynchronous calling
* Forced most of pinMode to be synchronous for now
* Implemented PWM output using hw_universal (cape-universal)
Merge branch 'master' of 191.168.7.2:bonescript/

Conflicts:
	index.js
	src/hw_universal.js