This PR addresses #506.

It also includes the action proposed in #500.

Changes to the original document:

• Removed the blip number, title and status from the heading and changed Author to Original Author
• Modified the abstract to better fit with the rest of Podcasting 2.0
• Turned codeblocks into json codeblocks
• Corrected the Example in the Abstract to a valid json with double quotes instead of single quotes
• Made the “Formatting and encoding” section a little clearer
• Made clear that multiple fields for identifying podcast and episode can be added
• Added guid to “use any of podcast, feedID or url”
• Made episode_guid preferred field for identifying episode because episode_guid does not rely on the episode being in the index
• Put tsabove time to reflect that ts is preferred
• Add auto option to action, as was proposed by @dhk2 in Adding "auto" as one of the action: types for Boostagrams #500
• Added to boost_link field description that it can be used for any action and that links may not contain podcast, episode AND timestamp, as Fountain currently only links to the episode not a timestamp.
• Switched recommended from name to sender_name because the receiver should know the name of their split anyway, but not the one of the sender
• Reformulated sender_id description
• Removed pubkey, seconds_back, sender_key, sig_fields, signature fields because no app is using them (Podverse sends the pubkey field but only puts the value “podverse-pubkey" in it)
• Removed value_msat because that information is in the invoice anyways
• Made value_msat_total recommended for numerology purposes
• Removed Motivation section
• Removed Rationale section
• Removed Universality section
• Removed Backwards Compatibility section
• Added Rust-V4V to Reference Implementations
• Added Examples & App Specifics section