Support for large messages

[coreyperkins]

The onData and receiveMessage functions in connection.js need to use streams to support large messages.

messageLength: 4294967299
UNCAUGHT EXCEPTION!!!!!
[RangeError: Invalid typed array length]
RangeError: Invalid typed array length
at new Uint8Array (native)
at createBuffer (buffer.js:23:15)
at allocate (buffer.js:98:12)
at new Buffer (buffer.js:53:12)
at Socket.onData (/Users/Corey/GitHub/UpdecSync/node_modules/event-store-client/lib/connection.js:92:47)
at emitOne (events.js:77:13)
at Socket.emit (events.js:169:7)
at readableAddChunk (_stream_readable.js:153:18)
at Socket.Readable.push (_stream_readable.js:111:10)
at TCP.onread (net.js:531:20)