message: Shared: Refactor ISocketIOMessage exports
diff: import {IMessage} from './IMessage';
  -enum SocketIOMessageType {
  +export enum SocketIOMessageType {
  COMMENT = 'comment',
  MESSAGE = 'message'
  }
  -interface ISocketIOMessageMeta {
  +export interface ISocketIOMessageMeta {
  type: SocketIOMessageType;
  parent: string;
  }
  // This is what clients receive.
  -interface ISocketIOMessage {
  +export interface ISocketIOMessage {
  meta: ISocketIOMessageMeta;
  message: IMessage;
  }
  // This is what's "posted" by the client to the ChatServer.
  -interface ISocketIOMessagePost {
  +export interface ISocketIOMessagePost {
  meta: ISocketIOMessageMeta;
  content: string;
  }
  -
  -export {ISocketIOMessagePost, ISocketIOMessage, ISocketIOMessageMeta, SocketIOMessageType};
  