PWM support

[kasperhartwich]

Could it be possible to support PWM (Pulse Width Modulation)?

[ronanguilloux]

I suppose yes: Please do not hesitate to add your own PR.
Some hints & ideas: http://raspberrypi.stackexchange.com/questions/298/can-i-use-the-gpio-for-pulse-width-modulation-pwm

[calcinai]

Hey, I know this is an old topic, but you might be able to pull the PWM code from a library I've been working on and add to this one?