This fixes memory leaks with PyQt 4.10 _except_ when using makeQImage(copy=False).
Tested on 4.9.3 and 4.10.2; need to be tested against other versions.

Minor edits

- fixed auto-levelling when normalization options change
- added autoHistogramRange argument to setImage

Configure matplotlib to use PySide in MatplotlibWidget

Fixed bugs in functions weave usage
Documented ROI signals
Fixed 3D view updating after every scene change

imageview fix

AxisItem correctly handles scaling with values that are not power of 10
Can remove items from legend
updated plotItem setLogMode to allow unspecified axes

PolyLineROI.getArrayRegion correctly applies mask to N-dimensional data
fixed multiprocess for python2.6 compatibility

Added antialiasing to GL line items

  - better handling of tick text / label area
  - ability to truncate axis lines at the last tick

Added style options to flowchart connection lines
SVG export bug - correctly handle coordinate corrections for groups with mixed elements
Updates to ScatterPlotWidget, DataFilterWidget, and ColorMapWidget
Added exit() function for working around PyQt exit crashes
Bidirectional pseudoScatter for beeswarm plots
Added several examples
Added BarGraphItem
Fixed GraphItem antialiasing
Added parentChanged and viewChanged hooks to GraphicsItem
Made LabelItem a subclass of GraphicsWidgetAnchor
Documented planned features for PlotDataItem (these should be fixed before next release)
ScaleBar complete rewrite
Re-fixed crash bug in ScatterPlotItem
fixed scatterplotitem antialiasing