Gnumeric 1.12.29

Jean:
	* Fix array reading in plots using matrix data. [#765483]

Morten:
	* Documentation fixes for complex numbers.
	* Fix rare RANDBETWEEN problem.
	* Test suite improvements.
	* Fix value-area problem.  [#765438]
	* Make xlsx shared strings parsing more robust.  [#765544]
	* Dead kittens.

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