v1.2.0

Added

• Dedicated renderer for pycharm steps: task description and project files.
  Files the course hides are labelled hidden, and often reveal the answer.
• Steps use the name the course gives them, instead of always falling back to
  Step <id> (<type>).

Changed

• New dependency on Markdown, so re-run pip install -r requirements.txt when
  upgrading.
• Internal: simpler dictionary defaults, wider test coverage.

Full Changelog: v1.1.0...v1.2.0