add cffi builpack and python 2.7.8 runtime
add apt buildpack for cffi
downgrade runtime to 2.7.4 from 2.7.8
more buildpacks and more syncup with working app
simplify miner models, but don't install app anyway
comment out tests of djdb and util
let runtime float
python2.7-dev in aptfile, no miner views used/imported (to avoid numpy)
fix Procfile to point to the right wsgi
back to unversioned python-dev apt and pug.crawlnmine.crawlnmine.settings in wsgi.py
full pug path to urls
Update ml.py
incorporate comments into docstrings
Add docstring to top
force hashable and force frozenset functions
Merge branch 'master' into lanehdev