update the clock documentation

docs/api/core/Clock.html

@@ -22,26 +22,45 @@
 		<h2>Properties</h2>
 
 		<h3>.[page:Boolean autoStart]</h3>
+		<div>
+		If set, starts the clock automatically when the first update is called.
+		</div>
 
 		<h3>.[page:Float startTime]</h3>
+		<div>
+		When the clock is running, It holds the starttime of the clock. <br />
+		This counted from the number of milliseconds elapsed since 1 January 1970 00:00:00 UTC.
+ 		</div>
+
 
 		<h3>.[page:Float oldTime]</h3>
+		<div>
+		When the clock is running, It holds the previous time from a update.<br />
+		This counted from the number of milliseconds elapsed since 1 January 1970 00:00:00 UTC.
+ 		</div>
 
 		<h3>.[page:Float elapsedTime]</h3>
+		<div>
+		When the clock is running, It holds the time elapsed btween the start of the clock to the previous update.<br />
+		This counted from the number of milliseconds elapsed since 1 January 1970 00:00:00 UTC.
+ 		</div>
 
 		<h3>.[page:Boolean running]</h3>
+		<div>
+		This property keeps track whether the clock is running or not.
+ 		</div>
 
 
 		<h2>Methods</h2>
 
 		<h3>.start()</h3>
 		<div>
-		Start clock.
+		Starts clock.
 		</div>
 
 		<h3>.stop()</h3>
 		<div>
-		Stop clock.
+		Stops clock.
 		</div>
 
 		<h3>.getElapsedTime() [page:Float]</h3>