0.2.0

• Complete Flags chapter — c2d2364
• Add more lookahead explanation — 1c351cd
• Make some explanations and examples clearer — c2dc7f9, b574b67
• Add more examples — 8c54a9d
• Fix typos — d3186eb (#25 by @Whatapalaver), 440aa2f
• Fix visual glitch in Groups example — d6e0195 (#24 opened by @ketra21)
• Add cover — 47cd2dc
• Several website improvements and fixes
  • Mobile-friendly 🎉 — #5, #26
  • Squash browser-specific bugs — #14
  • Add a sitemap — 0de0791
  • …

Thanks to all readers, stargazers, people who opened issues, and contributors!