#Screen Manager A screen manager for single page apps that need to switch between screens

###Example

import ScreenManager from 'screen-manager';
let manager = new ScreenManager();

Add screens to manager with key, value - screen must be object that impliments show/hide

let $screen0 = $('#screen0');
manager.add('screen0', $screen0);

Show and switch between screens

manager.focus('screen0'); // Shows screen0
let $screen0 = $('#screen1');
manager.add('screen1', $screen1);
manager.focus('screen1'); // Switches to screen1

Remove screen

manager.remove('screen0'); // Remove screen0 from manager