Adds support to open a predefined number of windows with a predefined position and size on init.
- Open ~/.hyperterm.js
- Add hyperterm-initial-windowsto the list ofplugins
- Change config.initialWindowsto the desired number of windows to open on init, by default opens just one.
- Set config.initialWindowsPositionto specify the position and size for each of the windows to create on init.
  config: {
    ...
    initialWindows: '3', 
    initialWindowsPosition: [
      {x: 0, y: 0, width: 800, height: 500},
      {x: 0, y: 550, width: 900, height: 400},
      {x: 800, y: 0, width: 700, height: 500}
    ],
    ...
  }
NOTE: Remember to place the options under config section.
mit
