v0.3.1-1

• Refactored module-day, module-event for multiline keys. For example, in the _modules YAML:

  ? |
    1. First Markdown list item.
    1. Second Markdown list item.
  : null
  

• Removed extra summary element bottom margin.
• Added overlays for pre code blocks: add the Kramdown block inline attribute {: overlay="Text to overlay" } to a code block.
• Upgraded to Just the Docs v0.3.1.