- added ability for ScatterPlotItem to use arbitrary symbol shapes
- added scatter plot speed test for evaluating new methods
- added butterworth notch filter to flowchart library
- fixed bugs with ViewBox trying to close itself after python has started cleaning up
- fixed python 2.6 compatibility bug in PlotCurveItem
- fixed support for list-of-dicts and dict-of-lists input for PlotDataItem
- check to ensure Qt version is >= 4.7
- workaround for numpy segmentation fault
- several other minor updates and documentation changes
- fixed handling of foreground colors in AxisItem
- fixed rare crash caused in AxisItem
- fixed improper propagation of key events from SpinBox
- many others
- fixed AxisItem sometimes drawing the same tick twice (sometimes with different text)
- fixed handling of record arrays in setting ScatterPlotItem point data
Flowchart updates - added/fixed some display nodes
Merge from Kratz:
- documentation updates
- ComboBox class (updateList() allows entire item list to change while remembering previous setting)
