Gnumeric 1.12.20

Andreas:
	* ODF import/export trendline names. [#743448]
	* ODF import/export trendline affinity & dimensions.
	* ODF import/export major & minor chart axis tick marks.
	* ODF import/export chart axis min and max formulae.
	* Fix ODF export of single cell ranges in graphs. [#743619]
	* ODF import/export series fill types. [#743613]
	* ODF import/export marker outline colour.
	* ODF export all charts in a graph.
	* ODF import/export axis positions.
	* ODF import/export series lines. [#743785]
	* ODF import/export all plots in a chart. [#743786]

Morten:
	* xlsx chart import: fix font family name.
	* xlsx import/export trend line names.
	* Fix gda plugin compilation.  [#743506]
	* Fix xlsx export problem with auto markers.
	* Import/export xlsx chart axis min/max/steps.
	* Export xlsx chart axis tick marks.
	* Fix xlsx problem with inverted axis.
	* Export sliders as scrollbars for xls.
	* Fix xls loading of horizontal scrollbars.  [#743754]
	* Plug leaks.
	* Fix xlsx comment export.
	* Make XL see our exported xlsx axes.
	* Fix xlsx import/export of axis font info.  [#743822]

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