docs: mention the need for worker process restarts to avoid "memory leaks" (Issue #346) It might not be ideal to mention such details in the overview, but that seems like the best place for generic advice. (Kallithea should still aim for keeping memory growth under control.)

# requirements.txt file for use as "pip install -r requirements.txt" as a
# readthedocs compatible alternative to "pip install -e ." which is a working
# alternative to "setup.py develop" which doesn't work with Mercurial 3.7
.