This commit removes generate_manifest.py and package data files
are now included using the package_data kwarg to setup().
This is because, in certain situations, MANIFEST.in is a bit
finicky. For instance installing a package using:
python setup.py install
doesn't include files specified in MANIFEST.in, while using
pip install ./zulip_bots
does. package_data doesn't pose this problem, ergo it's better
for us.
This program replaces zulip_bot_output.py, which had
gotten a little out of date.
It should be able to simulate a terminal conversation for
all of our bots, including those that use "advanced" features:
third party config files: tested with giphy
message updates: tested with incrementor
storage: tested with virtual_fs and others
