Add timeout object in callback mode (CPPAPIS-18)

include/NI660Xsl/BufferedAcquisition.h

include/NI660Xsl/BufferedEventCounting.h

include/NI660Xsl/BufferedPositionMeasurement.h

include/NI660Xsl/NI660XSLConfig.h

include/NI660Xsl/PulsedTask.h

include/NI660Xsl/PulsedTaskManager.h

src/BufferedAcquisition.cpp

src/BufferedEventCounting.cpp

src/BufferedPositionMeasurement.cpp

src/FinitePulseTrainGeneration.cpp

src/PulsedTask.cpp

src/PulsedTaskManager.cpp