Merge branch 'master' into release

  * fixed int parameter sizes and some signed/unsigned warnings
  * check whether m_port isn't NULL in ReadFromDevice
  * stop the processor thread and delete the CSerialPort instance on exit
  * added mutex in CSerialPort
  * fix segfault on exit
  * renamed libPlatform -> platform.
  * stuck everything from libCEC in the CEC namespace to avoid namespace
    polution