Installer: Use lzma2/ultra for compression

 - Thanks to this we're able to remove 1.92 MB (2018268 bytes) from installer
 - Note: this way memory usage is increased from from 95MB to 372MB
 http://www.jrsoftware.org/ishelp/index.php?topic=setup_compression

![total_commander_2014-08-25_12-48-29](https://cloud.githubusercontent.com/assets/80596/4028944/38615662-2c46-11e4-9f5a-fed4e412f916.png)