coroutine v0.4

This project aims to implement coroutines in C++ just for fun of it :)

For now there is only a implementation for:

• iOS arm7 (and armv7s ?),
• OSX i386,
• OSX x86-64.

Works with both LLVM GCC 4.2 and Apple LLVM compiler 4.1.

Tested on iPhone 4 with iOS 6.0, iPhone Simulator and Mac.