Feature/support position orientation devices interpretations

Add The pipeline for Position orientation interpretation :

• The reader output a polydata (Gps information) and a table (raw information of an IMU)
• The Stream have the same output than the reader, and manage a buffer of all Gps and imu information return by the interpreter.
• The interpreter is a generic Position Orientation interpreter : Contains a vtkPolydata and a vtkTable that contains the last Gps/Imu informations received in a packet. These 2 attributes are clean before a new packet is received (the buffer of all received information is in the Stream)