Log Message:
Update to 1.7.13:

Gnumeric 1.7.13

Jean:
	* Export font in charts to xls.
	* Export and import chart titles to/from xls. [#301720]

Jody:
	* XLSX import chart axes, singletons, some styles.
	* Merge in most of the win32 cleanup.
	* Fix autofilters on win32.

Jon KÃ¥re:
	* Fix python crash. [#461845]

Morten:
	* Fix minor date entry problem.
	* Fix minor time entry problem.
	* Fix page setup crash.  [#476467]
	* Fix scenarios.  [#477410]
	* Fix sheet filter crash .  [#477417]
	* Fix print crash.  [#478475]
	* Switch to new tooltip api.