Implementation of Bubble Babble encoder

Implementation of Bubble Babble encoder

        Bubble Babble encodes binary data into a sequence of
        human-pronouncable pseudo-words. See
        http://en.wikipedia.org/wiki/Bubble_Babble, http://wiki.yak.net/589.

[rsc, 2010-01-05 22:47:00]

The code seems okay (I haven't looked closely)
but this doesn't seem generally useful enough
to be a standard package (even the wikipedia article
only suggests "might be useful in" situations 
instead of actual uses).  I suggest putting it on
code.google.com as a separate project.
I hope that eventually we'll have a way to make
importing such code almost as trivial as importing
standard packages.