Content update for Web Monetization website

[huijing]

Based on discussions out of the Capetown work week, we have a broad structure of how we want to pique people's interest in Web Monetization:
To have funnel down “marketing copy” from general audience to increasingly technical and specific (each level down already reads/somehow consumes the copy above it)

• General public
  • What is WM elevator pitch
• People who would like to pay
  • Explain what is a wallet
  • Explain what the WM extension is
  • Explain payment mechanics
• People who would like to get paid
  • Explain payment pointer
  • Mention (link out to specific page)
  • Mention use-cases (link out to specific page)
• People who would like to implement WM in websites
  • Explain
  • Explain events
  • Explain CSP (link out to specific page)