* -C no cleanup (use with -w if you need are using a cache directory.)
* -p prefix for translation md5 generator (directory that files are in, and is removed
* from path when generating an md5 for the translated name.
+ * -a autoversion - suffixes the latest timestamp eg. Core-100000000.js
+ * -i update index file in output directory.
* compresses files listed as arguments and outputs result
*/