[name]
		Object for keeping track of time.
		Constructor
		[name]( [page:Boolean autoStart] )
		
		autoStart — Automatically start the clock.
		
		Properties
		[property:Boolean autoStart]
		
		If set, starts the clock automatically when the first update is called.
		
		[property:Float startTime]
		
		When the clock is running, It holds the start time of the clock. 
		This counted from the number of milliseconds elapsed since 1 January 1970 00:00:00 UTC.
 		
		[property:Float oldTime]
		
		When the clock is running, It holds the previous time from a update.
		This counted from the number of milliseconds elapsed since 1 January 1970 00:00:00 UTC.
 		
		[property:Float elapsedTime]
		
		When the clock is running, It holds the time elapsed between the start of the clock to the previous update.
		This counted from the number of milliseconds elapsed since 1 January 1970 00:00:00 UTC.
 		
		[property:Boolean running]
		
		This property keeps track whether the clock is running or not.
 		
		Methods
		[method:null start]()
		
		Starts clock.
		
		[method:null stop]()
		
		Stops clock.
		
		[method:Float getElapsedTime]()
		
		Get the seconds passed since the clock started.
		
		[method:Float getDelta]()
		
		Get the seconds passed since the last call to this method.
		
		Source
		[link:https://github.com/mrdoob/three.js/blob/master/src/[path].js src/[path].js]