Recompiled AVR toolchain

This is a drop-in replacement for the AVR toolchains

Currently there are three different AVR toolchains: based on Ubuntu 9 (linux), Crosspack (macosx), WinAVR (windows)
There are no instructions about how they were built and patched.

A repository has been set up with the instructions (scripts) and patches needed to compile the AVR toolchain on each supported platform: https://github.com/arduino/toolchain-avr

This way:
- there is a common place for all of us to play with the toolchain so that every effort we make to improve it (including updating it) is tracked by git and runnable by everyone on every OS (ie: the linux guy can come out saying "I've a 4.5 working" and the windows guy can compile and test it)
- we put some order