added environment variables to python config
removed gitignore, app.db, readme from python example
python: refactored create_jwt_token function
python: decode string byte after generating a token
python: parse_token helper function for account linking step
python: added to_json to User model
python: refactored login_required to use parse_token
python: fixed parse_token function
python: return token after signup
python: added facebook account linking
Merge remote-tracking branch 'origin/master'