Log Message:
goffice0.10: Update to 0.10.47

goffice 0.10.47:

Jean:
	* Fix crash if a XY plot series has data labels but no valid data. [#426]
	* Fix criticals related to data labels. [#428]
	* Fix a drawing error in contour plots. [#458]
	* Ensure that all required dims have valid data in a valid series. [#466]
	* Fix legend order in bar plots.
	* Test plot series validity after a data change. [#468]
	* Fix crossing axis position. [#45]
	* Fix component duplication. [#483]

Morten:
	* Fix library namespace issue.
	* Implement auto-by-extension for image files.