message: update prop types (and fix typo)
diff: @@ -48,9 +48,6 @@ module.exports = React.createClass({
  onJoinClick: PropTypes.func,
  onRejectClick: PropTypes.func,
  onForgetClick: PropTypes.func,
  - onSignInClick: PropTypes.func,
  - onSignUpClick: PropTypes.func,
  -
  // if inviterName is specified, the preview bar will shown an invite to the room.
  // You should also specify onRejectClick if specifiying inviterName
  inviterName: PropTypes.string,
  @@ -69,7 +66,9 @@ module.exports = React.createClass({
  // purpose of the spinner.
  spinner: PropTypes.bool,
  spinnerState: PropTypes.oneOf(["joining"]),
  -
  + loading: PropTypes.bool,
  + joining: PropTypes.bool,
  + rejecting: PropTypes.bool,
  // The alias that was used to access this room, if appropriate
  // If given, this will be how the room is referred to (eg.
  // in error messages).
  @@ -185,7 +184,7 @@ module.exports = React.createClass({
  },
  _roomName: function(atStart = false) {
  - const name = this.props.room ? this.props.room.name : this.props.room_alias;
  + const name = this.props.room ? this.props.room.name : this.props.roomAlias;
  if (name) {
  return name;
  } else if (atStart) {
  