Support revision 2 board / newer wiringpi library?

[bokmann]

There's an update to the wiringpi library that auto-detects the revision of raspberry pi and adapts the pin number mappings to take into account the changed pinout of the header. Any plan to upgrade? I just looked at what it might take to do a pullup request, but I'm not familiar enough with swig and the ruby to c interface to do it with confidence...

[itkevin]

This should help WiringPi/WiringPi-Ruby#7
This was my first try with swig so I would welcome any suggestions.

[Gadgetoid]

All new WiringPi functionality will be available in WiringPi2-Ruby, which is replacing this library very shortly. I've just got some more Ruby class luciousness to write and it'll be ship shape.

Early birds with a taste for the wild side and a disdain for instant gratification can play with the source thus far: https://github.com/Gadgetoid/WiringPi2-Ruby