Use rsync instead of `cp --parents`, which is a GNU-cp-only flag
optionally use cohttp-server instead of the Python one

(for some reason, the Python one occasionally wedges and refuses
to server traffic on localhost in MacOS X)
release 0.9.2
Merge pull request #83 from avsm/master

Use rsync instead of `cp --parents`, which is a GNU-cp-only flag