Simple C++11 FSM. No dependencies.

tested with:

• g++ 4.7.2
• g++ 4.8.2
• arm-none-eabi-g++ 4.8.2 with rdimon libc
• clang++ 3.4
• clang++ 3.5

arm-none-eabi compiler can be tested with qemu.

make arm
qemu-arm ./test_arm