Qt 5.2.0 Integration

I've integrated your code with Qt 5.2.0, and it's compiling.  I've also integrated the communication with the QSerialPort library, instead of qextserialport.  I've place my changes here, in case my computer crashes or something bad happens.

In the process, I disabled a significant amount of functionality because I don't have a system to test on.  I've inserted the comment [LA] as a placeholder wherever I've commented things out.  I should have a bluetooth  ODB device in my hands this week, and (hopefully) a hardware simulator sometime this spring.