Added nextTick() support to LibEventLoop (based off ExtEventLoop).
Added nextTick() support to LibEventLoop (based off ExtEventLoop).

steverhoades/event-loop,mkrauser/event-loop,kaduev13/event-loop,reactphp/event-loop,kaduev13/event-loop,mkrauser/event-loop,clue-labs/event-loop,steverhoades/event-loop