produce an even better compression ratio at the cost of more time spent
compressing.
+ `wimlib-imagex optimize' now supports the '--compress=TYPE' option,
+ which recompresses the WIM file using the specified compression TYPE.
+ The new library API function used for this is
+ wimlib_set_output_compression_type().
+
Added the wimlib_get_xml_data() function to allow library clients to
easily retrieve the raw XML data from a WIM file if needed.