Log Message:
Update to 1.14.11:

libgsf 1.14.11

Jody:
	* win32 build fix for glib-2.18 deprecation.
	* Extend MS Office Open Pkg handling to accept POI files.
	* Add libxml2 wrapper to simplify probing.

Morten:
	* Solaris compilation issue.  [#558253]
	* Handle non-seekable files in gsf_input_stdio_new.  [#154417]

Paul:
	* Fix various Mac compilation issues.  [#565603]  [#565605]

Pedro Fragoso:
	* Clean up glib includes.  [#564004]

Richard W.M. Jones
	* MinGW configure fix for libbz2 detection.