Merge pull request #15 from denniszhuo/master

Major update for AVDECC Controller library
controller: lib, add linux vsprintf_s define for linux compile
controller: lib: get notification and log threads to compile in linux
ontroller: lib: add linux version of system_message_queue
Merge pull request #16 from andrew-elder/master

linux log and notify classes
controller:lib: Updated source code and changed static variables into
member variables. Added member functions called by static
thread processing functions.