Log Message:
Update to 1.2.13:

Andreas:
	http://bugzilla.gnome.org/show_bug.cgi?id=142219
	* Handle borders in latex export correctly (broken in 1.2.12 only)
	http://bugzilla.gnome.org/show_bug.cgi?id=142219
	* Handle borders in latex export correctly
	http://bugzilla.gnome.org/show_bug.cgi?id=143577
	* fix grid printing

Emmanuel Pacaud:
	http://bugzilla.gnome.org/show_bug.cgi?id=142212
	* In a line graph, don't use '0' if Y value is missing.

Jody:
	http://bugzilla.gnome.org/show_bug.cgi?id=141940
	* Fix MS XL crash when there are too many strings
	* xls import gradient backgrounds in chart elements
	* Restore the font selector to chart editors
	* Support series with no entry in a legend
	http://bugzilla.gnome.org/show_bug.cgi?id=142267
	* Fix drawing selection below hidden merged cells
	http://bugzilla.gnome.org/show_bug.cgi?id=103054
	* Fix xls named expression and addin import/export
	http://bugzilla.gnome.org/show_bug.cgi?id=142474
	* Use first rather than last conditional value fmt as catch-all
	* Enable implicit iteration for operators
	http://bugzilla.gnome.org/show_bug.cgi?id=143577
	* Re-enable gridline printing

Morten:
	* Fix image-inside-xls problem.
	* Improve error handling in xbase plugin.
	* Fix parser problem with single empty arg after expression.