WiFly Terminal Example

I was getting my WiFly shield working again and updated the example code (from here) for Arduino 1.0.

It now uses the SPI library.  I also cleaned up the SPI/UART initialization; since it is only used in one mode I didn't see the need for all the #defines and the configuration structure, so I eliminated them and hardcoded the values and registers.  It makes for shorter code that is harder to understand, but there is less boilerplate to copy/paste this way.

Here it is:  WiFly Terminal for Arduino 1.0

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