Add probot-stale support of dspp-keras repo

Modify README.md to address the propensity scale issue

Bump version number

Fixes #23 error when downloading data from python3

Bumping version to 0.0.4

Implement Matt's changes to README.md

Fix asyn figure link

Host images from static domain

Fix image links

Implement @jandom suggestions

Add asyn propesnity figures to README.md

Improve propensity section of README.md

Correct MOAG-4 image

Provide one-hot and propensity mapping examples.

Expand README.md