Add schedule automation script and Makefile

[tedski]

• Makefile makes development easier
• Schedule generation script reduces steps and affords the ability to
  run schedule generation from a CI pipeline (e.g. travis)

An example for travis-ci to github pages might be:

language: python
install: "pip install -r requirements.txt"
script: "python ./get_schedule.py"
deploy:
  provider: pages
  skip_cleanup: true
  github_token: $GITHUB_TOKEN # Set in travis-ci.org dashboard
  on:
    branch: gh-pages