The EPS encoder wasn't part of Gohlke's test suite, so the previous "fixes"
there were only expected syntactic ones. This gives a cleaner fix to the
encoder.
The decoder doesn't work in round-trip due to a missing eps_decoder method
on the core module, but it's clear it worked at some point.
This is Christoph Gohlke's test suite from his personal PIL package found
at http://www.lfd.uci.edu/~gohlke/pythonlibs/.
This is just to bring it in as a separate commit. Future commits will align
it with Pillow.
