Ignore multifile in make check for now
Ignore multifile in make check for now

The root cause is that sphinx replaces docutils directives
with its own version, but doc8 doesn't know about sphinx
directives.  I think the better long term fix is going to be
either use sphinx directly to verify docs, or to load the
sphinx directives in doc8.

Either way, I don't think this should be a hard bocker.

freaker2k7/chalice,awslabs/chalice