arduino hg (legacy)

This is a replacement for the standard Arduino library which lets you write C code instead of C++ code. The library has been designed to be very space efficient, but I’m waiting for a gcc bug to be resolved (http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51506) before I make the claim that it is.

I’ve used it for a few programs on my board, but there are no guarantees it won’t brick it. Use at your own risk.