Add .travis.yml to enhance working-ness of Travis build
Remove WORKSHOP.md readme file

It suggests that people commit back their changes to the
opening/closing presentations. Realistically, nobody ever
does that, which is fine.
Create job-board curriculum for begintermediate students

- Add discussion, error, and source_code_with_message methods
- Update docs index
Rename name-collisiony discussion method so that the intermediate curriculum isn't broken
Fix silly name clashing that ruined the intermediate curriculum CSS