Changed sendPinValues() to send the most significant byte first.
Smalltalk commit:

* Added very basic example scripts to Uzi class.
* Changed default pin mode from 0 to 1 (I was mistakenly treating OUTPUT as 0).
* Changed UziProtocol>>processPinValue to expect the most significant byte first, and also to scale it down from 0..1023 to 0..1.
* Changed UziProtocol>>setPin:value: to scale up the value from 0..1 to 0..255.