Move from C++03 to C++11 and from llvm-gcc to llvm for emulator
Complete USART code (not tested)
Refactor: move peripheral initialisation records to <variant>.cpp
Add a file missing from ece8b4b7e4705c625f2a017aaf26708eee8e40ba
Add first incomplete version of Arduino Serial class
Add test case test_Serial_begin
Fix (tentative) to Data16NoAddress
Add a temporary yield() implementation, to be replaced with a real one
Add Serial.write(uint8_t)
Add test case for Serial.write(uint8_t)