Rework connections/readme.md to be more concise

[ShadowJonathan]

Fixes #238

Here I have some reworking and rewriting of the original connections spec, I personally find it too much of a core specification to be left ambiguous, thus I have done a rough cleanup of the document to more precisely document the core definitions and leave less ambiguity.

My methodology of moving and changing up the document was thus:

• Put exacting definitions first

• Describe the rough process of establishing a connection, be agnostic to implementations

  • Provide exact and clear definition of how bootstrapping a connection to a process works (this is most critical, and the main motivation behind reworking this document)

• Reuse as much from the original document, place in the rough footer of these definitions.

(pinging @yusefnapora, @JustMaier, @vasco-santos, @bigs, @mgoelzer)

(Please provide feedback to my draft, I expect this document to not be final as-is, but to at least put a step in the right direction)

[ShadowJonathan]

@raulk i want to get one thing down: to this document, streams are an application-level concept, implemented by a multiplexer protocol, while it is indeed convention to establish these at the start of each connection, i think this should explicitly be separated from connection-establishment as a method in further chapters to address application-level concerns (easily create connections for protocols to live on), not to mingle amongst fundamental definitions, as i think that would only complicate and obfuscate this document.

Specifically, streams are an IPFS concern and solution, libp2p is supposed to be modular, thus this document should reflect that, and effectively allow any and all forms of connection-establishment by mutual agreement on protocols, and to have that form itself from a baseline (the Bootstrap Protocol Negotiation).

[ShadowJonathan]

I will be closing this as there has been no progression, response, or any substantial change to the libp2p methodology lately. You can take these changes and work with them, or you can contact me to reopen it, but i will be closing this as to remove this from my todo list.