2007-11-21 [colin] 3.1.0cvs14

2007-11-21 [colin]	3.1.0cvs14

	* src/compose.c
	* src/crash.c
	* src/exphtmldlg.c
	* src/mainwindow.c
	* src/manual.c
	* src/mimeview.c
	* src/prefs_account.c
	* src/prefs_common.c
	* src/prefs_common.h
	* src/prefs_ext_prog.c
	* src/textview.c
	* src/uri_opener.c
	* src/gtk/about.c
	* src/gtk/gtkutils.c
		Use xdg-open as a way to find default browser,
		when available