use '--compression lzo' instead of '--lzo', so we don't have to introduce a new argument when we add more compression methods

If we add more compression methods, we should improve it even further: We shouldn't have to edit zbackup.cc at all. IMHO, this introduces additional complexity that I wouldn't introduce before there is a good reason to do so.
fix a wrong word
add my copyright to the files that I created or modified
use the NoCopy class to make sure EnDecoder cannot be copied