v0.0.2: Version 0.0.2

Rearchitect things a little bit; we now process input in chunks, instead
of a byte at a time.  In my completely unscientific testing, this
improves the speed for large amounts of data by about 4x.

v0.0.1: Initial release

This is an initial release of emoji256, which currently only supports
reading data from stdin and writing it to stdout.