Rename and enhance AtomicComponent.init

[anselmbradford]

Current behavior

• AtomicComponent.init does not convey that it is for querying the whole document for a component and does not allow attaching a callback to an element.

Expected behavior

• @sebworks suggested this structure by renaming the method for clarity and including an HTMLNode and callback function as a parameter:

AtomicComponent.instantiateAll = function( dom, callback ) {
  var elements = ( dom || document ).querySelectorAll( this.selector );
  var element;
  var components = [];
  for ( var i = 0; i < elements.length; ++i ) {
    element = elements[i];
    if ( element.hasAttribute( 'data-bound' ) === false ) {
      var instance = new this( element );
      components.push( instance );
      callback ( index, instance)
    }
  }
  return components;
};