message: Add /spoiler command
  As a temporary measure until we have an extensible Markdown parser.
diff: @@ -154,6 +154,18 @@ function success(promise?: Promise<any>) {
  */
  export const Commands = [
  + new Command({
  + command: 'spoiler',
  + args: '<message>',
  + description: _td('Sends the given message as a spoiler'),
  + runFn: function(roomId, message) {
  + return success(MatrixClientPeg.get().sendHtmlMessage(
  + roomId, message,
  + `<span data-mx-spoiler>${message}</span>`,
  + ));
  + },
  + category: CommandCategories.messages,
  + }),
  new Command({
  command: 'shrug',
  args: '<message>',
  