gettext(1) implementation

[William Orr <will%worrbase.com@localhost>]

Hey,

For testing some of my changes, I ended up writing a BSD-licensed gettext(1)
implementation. I'm not sure how useful people will find it, but I found it
very useful for testing gettext extraction.

Currently, I've implemented the same features that exist in the GNU gettext(1)
command. I'm thinking of adding more (easier message context support, for one)
if this gets merged.

Thanks,
William Orr