Highlights of this release include:

• Plotting and Annotation improvements
  • Axes.inset_axes is no longer experimental
  • Legend support for Boxplot
  • Percent sign in pie labels auto-escaped with usetex=True
  • hatch parameter for stackplot
  • Add option to plot only one half of violin plot
  • axhline and axhspan on polar axes
  • Subplot titles can now be automatically aligned
  • axisartist can now be used together with standard Formatters
  • Toggle minorticks on Axis
  • StrMethodFormatter now respects axes.unicode_minus
• Figure, Axes, and Legend Layout
  • Subfigures now have controllable zorders
  • Getters for xmargin, ymargin and zmargin
• Mathtext improvements
  • mathtext documentation improvements
  • mathtext spacing corrections
• Widget Improvements
  • Check and Radio Button widgets support clearing
• 3D plotting improvements
  • Setting 3D axis limits now set the limits exactly
• Other improvements
  • New BackendRegistry for plotting backends
  • Add widths, heights and angles setter to EllipseCollection
  • image.interpolation_stage rcParam
  • Arrow patch position is now modifiable
  • NonUniformImage now has mouseover support