Gnumeric 1.12.47

Andreas:
	* Fix chart and image name roundtrip through ODF. [#477]
	* Fix print flag roundtrip for sheet objects through ODF. [#486]

Jean:
	* Fix crash when the embedded spreadsheet is invalid. [#481]

Morten:
	* Fix dialog size problem.
	* Add "--set CELL=CONTENTS" option to ssconvert.
	* Improve tests.
	* Improve speed on exit with lots of conditional formatting.
	* Improve error message [#472]
	* Impose ordering of ssconvert --export-graphs
	* Doc fixes.
	* Fix CELL crash.  [#479]
	* Handle export options for ssconvert --export-graphs.
	* Fix deps crash.  [#480]
	* Fix chart name roundtrip through XLSX.  [#478]
	* Fix sheet object print flag roundtrip through XLSX.  [#486]

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