Communication protocol

[SrimantaBarua]

Note: Have a look at #6 too.

What will we need to send data for? I've come up with this list so far -

• Client -> Server : edits
• Client -> Server : cursor position
• Server -> Client : buffer updates
• Server -> Client : others' cursor positions
• Client -> Server : configuration
• Client -> Server : non-editing commands

Please do add to this list.

How are we going to do this? I'm thinking JSON.

{
    "type": "edit",
    "line": 20,
    "offset": 50,
    "string": "new string"
}

Something like this for 1., and so on for others.

Thoughts?