* gnomevfs/Directory.cs: New Create and Delete methods. Free the
FileInfo List returned by gnome_vfs_directory_list_load.
* gnomevfs/FileInfo.cs: Copy the FileInfoNative struct so the original
can be properly freed.
* gnomevfs/Vfs.cs: Move MakeDirectory and RemoveDirectory to Directory.
svn path=/trunk/gtk-sharp/; revision=35535