newest pyqtgraph added. Tested with python2 and 3

vviewer/ColorMapItem.py

vviewer/SliceBox.py

vviewer/pyqtgraph/GraphicsScene/GraphicsScene.py

vviewer/pyqtgraph/GraphicsScene/exportDialog.py

...wer/pyqtgraph/GraphicsScene/exportDialogTemplate_pyqt5.py

vviewer/pyqtgraph/GraphicsScene/mouseEvents.py

vviewer/pyqtgraph/Qt.py

vviewer/pyqtgraph/SRTTransform.py

vviewer/pyqtgraph/WidgetGroup.py

vviewer/pyqtgraph/__init__.py

vviewer/pyqtgraph/canvas/Canvas.py

vviewer/pyqtgraph/canvas/CanvasItem.py

vviewer/pyqtgraph/canvas/CanvasTemplate.ui

vviewer/pyqtgraph/canvas/CanvasTemplate_pyqt.py

vviewer/pyqtgraph/canvas/CanvasTemplate_pyqt5.py

vviewer/pyqtgraph/canvas/CanvasTemplate_pyside.py

vviewer/pyqtgraph/canvas/TransformGuiTemplate_pyqt.py

vviewer/pyqtgraph/canvas/TransformGuiTemplate_pyqt5.py

vviewer/pyqtgraph/canvas/TransformGuiTemplate_pyside.py

vviewer/pyqtgraph/colormap.py