Adding config for maximize on startup

[Garry Yao]

We should have a config entry for initial maximize as we have with 'show block' plugin.

[Frederico Caldeira Knabben]

Milestone CKEditor 3.x deleted

[Jakub Ś]

Currently tis can be done with below code but this option sounds nice.

var editor = CKEDITOR.replace( 'editor1');
editor.on( 'instanceReady', function(event){ 					
	event.editor.execCommand( 'maximize'); 
});