[sword-devel] update to usfm2osis.pl

[Chris Little]

There's an update (version 1.3) to usfm2osis.pl: 
http://www.crosswire.org/ftpmirror/pub/sword/utils/perl/usfm2osis.pl

I would recommend SFMToOSIS over usfm2osis.pl, but since our util is so 
much easier to actually use, I thought it would be good to update it 
nonetheless. The update (in comparison to the previously released 
version) fixes a few bugs, but most importantly adds an encoding 
argument. Execute without arguments to get the syntax and a list of 
encodings supported by your system.

--Chris