* QSerialPort instantiation is not solely owned by SimpleTerminal anymore.
  This allows for QML to maniulate settings; could have done this without
  this change, but would need to add Q_PROPERTIES for all settings already
  provided by QSerialPort

* Now handles all of the settings in the settings dialog. However, this
  has not been tested and could be implemented cleaner in the QML

* Update status text such that it accounts for all the important settings.
  Signals refresh the status appropriately

* Now allocating simpleTerminal on heap to allow it to be a Qt child

* Eliminated use of a model for baud rates; will implement something more
  concrete in the future

* Elminated private members of SimpleTerminal like _baudRate because they
  are redundant; this data is already stored in QSerialPort