Merge branch 'dev' of https://github.com/mrdoob/three.js into dev

docs/api/math/Frustum.html

@@ -43,7 +43,7 @@
 
 		<h3>.intersectsObject( [page:Object3D object] ) [page:Boolean]</h3>
 		<div>
-		Checks whether the object is inside the Frustum.
+		Checks whether the object's bounding sphere is intersecting the Frustum.
 		</div>
 
 		<h3>.clone() [page:Frustum]</h3>