Craft Hard Specification for Message.

[jalcine]

In order to ensure a decent level of predictability for (or a lack of the need of) for messages in Wintermute, this issue (until the release of 0.1.0) serves as a reference point for what a Message object should initially be in JSON. Things that base themselves upon a Message like MethodCall and the likes will have their own implementation but will be contained within a message.

Some things pivotal for a message's integrity:

• [x] timestamp - The time, in UTC, at which a message was crafted. This doesn't represent when it was sent though, not sure if that matters.
• [ ] sender - The information needed to learn about the instance of Wintermute that sent this Message. Initially, this was equivalent to a JSON object representing a Module::Designation object but more information might be needed.
• [ ] receiver - The information needed to learn about the instance of Wintermute to receive this Message. Initially, this was equivalent to a JSON object representing a Module::Designation object but more information might be needed.
• [ ] payload - This would be the actual data being sent to the receiver. This is expected to be a dictionary, though later implementations might change this.

  Proposed Fields

• [ ] flags - An array of text representing fields that were used to modify the payload value. Something like this would help with encryption, signing and the likes.

[jalcine]

66 closed out the timestamp field. Now the sender + receiver fields can be done in tandem.