- converted most old-style signals into new-style for PySide compatibility (beware: API changes)
- removed ObjectWorkaround, now just using QGraphicsWidget
- performance enhancements, particularly in ROI.getArrayRegion
- numerous bugfixes
- Lots of bug fixes
- API change in PlotItem.plot(...)
- Started replacing QObjectWorkaround with QWidget
- Made plotCurveItems clickable
- Added curve-following arrows