v0.3.0

• [Update] Internal improvements.
• [Update] Added the Harlowe.tags() method.
• [Examples] Added two more examples:
  • (say:)/(character:) A port of the CMFSC2 speech box system.
  • (playtime:) A simplified port of the CMFSC2 playtime system.
• [Docs] Documented example macros.
• [Meta] Added minified versions of example macros.