Multi ship + sessions

[jonotron]

Note: This WILL BREAK interation.html

See socket_test.html for an example of how multiple ships are communicated to on the main loop message.

Major changes

• openspace.loop socket message contains the world which has a ships array
• openspace.welcome socket message contains your ship
• ship commands can only be executed on the players ship via their node session

  upgrade notes

I highly recommend using underscore on the client for easier array manipulation. See openspace.js for some basic examples.

You will also need to do the following:

npm install connect underscore