Enable tooltips and coordinates by default.

Lots of people ask about implementing tooltips; hopefully enabling it by
default will help them find it more easily.

examples/interacting/index.html

@@ -111,14 +111,14 @@
 		<p>One of the goals of Flot is to support user interactions. Try pointing and clicking on the points.</p>
 
 		<p>
-			<label><input id="enablePosition" type="checkbox"></input>Show mouse position</label>
+			<label><input id="enablePosition" type="checkbox" checked="checked"></input>Show mouse position</label>
 			<span id="hoverdata"></span>
 			<span id="clickdata"></span>
 		</p>
 
 		<p>A tooltip is easy to build with a bit of jQuery code and the data returned from the plot.</p>
 
-		<p><label><input id="enableTooltip" type="checkbox"></input>Enable tooltip</label></p>
+		<p><label><input id="enableTooltip" type="checkbox" checked="checked"></input>Enable tooltip</label></p>
 
 	</div>