* thunar-vfs/thunar-vfs-mime-database.c
	  (thunar_vfs_mime_database_get_default_application): Fall back to the
	  first available application if no explicit default application is
	  set by the user.
	* thunar/thunar-file.{c,h}, thunar/thunar-launcher.c: Rename
	  thunar_file_list_dup() to thunar_file_list_copy() to get
	  consistent naming.
	* thunar-vfs/thunar-vfs-mime-application.{c,h}: Add support methods
	  required for hashing.
	* thunar-vfs/thunar-vfs-mime-application.{c,h}: Add methods to launch
	  an application on a given list of URIs on a specific screen. Implement
	  the Desktop Entry Specification 0.9.4, except for startup notification
	  support, which will be added soon.
	* thunar/thunar-launcher.c, thunar/thunar-open-with-action.c: Allow
	  users to open files using the newly added ThunarVfsMimeApplication
	  functionality.




(Old svn revision: 16828)