Ethernet shield library

[carlos4242]

Anyone who wants to start contributing, a really great addition to the library would be to write a library for the Arduino Ethernet shield, plus related libraries for a tcp stack.

As always, keep it minimal, lean and mean, you'll only be able to use the S4A style Swift so no structs, enums or classes. If the language gives serious problems, drop me a line and I'll give advice how to work around most issues or, in extremis, try to patch the language to resolve the issue you're experiencing.

The arduino ethernet shield uses SPI to communicate so you'll need to familiarise yourself with the SPI functions from the AVR module.