Change timestamps to int64

...Plugins/BasicSpikeDisplay/SpikeDetector/SpikeDetector.cpp

Source/Plugins/BinaryWriter/BinaryRecording.cpp

Source/Plugins/BinaryWriter/BinaryRecording.h

Source/Plugins/EcubeSource/EcubeThread.cpp

Source/Plugins/KWIKFormat/RecordEngine/HDF5Recording.cpp

Source/Plugins/KWIKFormat/RecordEngine/HDF5Recording.h

Source/Plugins/KWIKFormat/RecordEngine/KWIKFormat.cpp

Source/Plugins/KWIKFormat/RecordEngine/KWIKFormat.h

Source/Plugins/NWBFormat/NWBRecording.cpp

Source/Plugins/NWBFormat/NWBRecording.h

Source/Plugins/SerialInput/SerialInput.cpp

Source/Plugins/SpikeSorter/SpikeSortBoxes.cpp

Source/Plugins/SpikeSorter/SpikeSortBoxes.h

Source/Plugins/SpikeSorter/SpikeSorter.cpp

Source/Processors/Events/Events.cpp

Source/Processors/Events/Events.h

Source/Processors/RecordNode/OriginalRecording.cpp

Source/Processors/RecordNode/OriginalRecording.h

Source/Processors/RecordNode/RecordEngine.h

Source/Processors/RecordNode/RecordThread.cpp