Changed .tar.gz extention to .tgz.
Changed .tar.gz extention to .tgz.

* Fixed #102.

galah-group/galah,brownhead/galah,ucrcsedept/galah,ucrcsedept/galah,galah-group/galah,galah-group/galah,brownhead/galah,ucrcsedept/galah,brownhead/galah