Gnumeric 1.12.23

Andreas:
	* Fix memory handling error on fuzzed sxc file. [#748535]
	* Improve import/export of page layout from/to ODF.
	* Improve function import to ODF. [#750627]
	* Add CONFIDENCE.T, MODE.MULT, PERCENTILE.EXC, PERCENTRANK.EXC
	  and QUARTILE.EXC.
	* Fuzzed file fixes.  [#751060] [#751501] [#751851] [#751922]
	* Fix ODF import of named expressions. [#750627]
	* Import reference unions from ODF. [#750627]
	* Improve CONVERT function.

Jean:
	* Fix xlsx import of plot area manual layout. [#748016]
	* Fix out of bounds read. [#749121]
	* Fuzzed file fixes.  [#750042] [#751217] [#751270] [#751271]
	  [#751383] [#751384] [#751758] [#751744] [#751908] [#751920]
	  [#751249] [#751945] [#751909] [#751946] [#751968] [#751969]
	  [#751971] [#751989]

Morten:
	* Fix import/export of graph backplane.
	* Fix export of unlabelled axes.
	* Fix export of rotated axis labels.
	* Fix xlsx save crash related to shared strings.  [#748477]
	* Solver code refactoring.
	* Plug leaks.
	* Fuzzed file fixes.  [#748595] [#748597] [#749031] [#749030]
	  [#749069] [#748533] [#749118] [#749166] [#749181] [#749184]
	  [#749236] [#749240] [#749234] [#749235] [#749271] [#749270]
	  [#749424] [#749917] [#749919] [#750043] [#750044] [#750046]
	  [#750811] [#750810] [#750857] [#750864] [#750862] [#750858]
	  [#751126] [#751254] [#751253] [#750851] [#751258] [#751259]
	  [#751502] [#751390] [#751579] [#751659] [#751660] [#751662]
	  [#751970] [#752022] [#751988] [#752021] [#752080] [#752081]
	  [#752124]
	* Make solver check linearity of model.
	* Fix xls saving of marker style.  [#749185]
	* Make compilation with clang work again.  [#749138]
	* Fix xlsx problem with import of header/footer.  [#750853]
	* Fix xls save problem with characters outside codepage.  [#750856]
	* Fix named expression problem.  [#751056]
	* Fix xlsx namespace problem.  [#751120]
	* Protect database functions against malformed database.  [#751392]
	* Fix csv problem with invalid UTF-8 data.  [#751577]
	* Fix GROWTH.  [#751658]
	* Restrict TABLE to array context.  [#751871]

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