Fixes 316120, b.x.c: 76185
* gsf/Gsf.metadata: Hide the Get/Set methods for DocProp value.
* gsf/DocProp.custom: Tweaks to work around odd API in libgsf that returns GValue*. This uses the glue code as the workaround.
* glue/gsf-doc-prop-glue.c: Wrapper for gsf_doc_prop_get_val and gsf_doc_prop_set_val functions.
* glue/gsf-doc-prop-glue.h: Glue header.
* glue/Makefile.am: Make script.
* makefile.am: build glue code
* configure.in: -- ditto --
svn path=/trunk/gsf-sharp/; revision=52341
Joe Shaw
Chris Lahey