goffice 0.10.21:

Jean:
	* Ignore invalid values while checking data order. [#744200]
	* Ensure that GOPixbuf 	keeps the original data around. [#745297]
	* Fix sheet objects rendering, including widgets. [#744076]

Morten:
	* Fix problem with linear solver.
	* Add arrow selector widget.
	* Fix rendering of dotted lines.  [#744419]
	* Activate font part of graph theming.
	* Plug leaks.
	* Add tooltips to gradient selector.
	* Add tooltips to pattern selector.
	* GOImage fixes.

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