Emmanuel Pacaud:
* Composite graph image onto white background when exporting to
formats that don't support alpha channel [#339126].
* Add support for background stripes.
* Add radian and grad unit support for polar plots.
* Add rotation support for polar plots.
* Fix display of log axis minor ticks [#341880].
* Add new ?pi/? format, mainly for polar plot use.
* Fix bar/col plots when using log scale.
* Fix a crash when polar plot width or height == 0 [#349238].
* Swith to cairo renderer [#314211] [#310322].
* New pattern, gradient, color and line selectors [#152673].
Ivan Wong :
* [Win32] Add the attribute GO_VAR_DECL for public global
variable so that public header files are now compatible with
MSVC.
Jean Brefort:
* Add a half pie plots.
* Allow to chose an interpolation type for each series in
scatter plots.
* Implement vertical box-plots. [#358153]
Morten:
* Make text combos work in overflowed toolbars. [#157901]
* Avoid CRITICALs on formatting invalid dates.
* Fix rendered for non-Cairo case. [#341999]
