Initial commit (again)
Removed some debugging code, moved examples
Numerous updates merged from acq4
merged many changes in from acq4:
 - added vertical lines / regions for plots
 - added gradient editor widget
 - many bugfixes
 - cleaned up imageview a bit
minor updates / fixes
fix--forgot to add ptime module
added signalproxy class
little fix --plots may contain nans now
Numerous fixes
added scatter plots
- changes to get some examples working on my side
  (test_PlotWidget.py, test_MultiPlotWidget.py)
  (ubuntu 10.10, python 2.6.6, qt 4.7.0, pyqt 4.7.4, numpy 1.3.0)
- added&enabled wheelEvent for PlotItem (symmetric scaling)
- ScaleItem: avoid drawing of multiple ticks at the same position
Merge from ACQ4:
 - Lots of bug fixes
 - API change in PlotItem.plot(...)
 - Started replacing QObjectWorkaround with QWidget
 - Made plotCurveItems clickable
 - Added curve-following arrows
Merge changes from lp:~ibressler/pyqtgraph/devel
bugfixes
- Disables panning of the whole scene by mousewheel if the event is not
  catched earlier by an item implementing this. Test it at the empty space 
  where the auto button appears in the plot window or on the scaleItems.
  Which element does this panning by default? parents: scene or view?
- asymmetric scaling by mousewheel over scales (ScaleItem)
sync with lp:~luke-campagnola/pyqtgraph/main
- sync with lp:pyqtgraph (missing changes in PlotItem.py)
Updates merged in from ACQ4:
  - 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