Add config module from flask
Add configuration error
Collect static assets in STATIC_PATH
Add docstrings
Rename config.py -> _config.py

Prevents clashing with mfr.config object
Use STATIC_FOLDER config value for collect_static destination
Update app.py to use mfr.config
Update README
gitkeep static folder
Merge pull request #51 from CenterForOpenScience/feat/config

Feat/config