Add isQuaternion and isTexture in documentation

docs/api/en/math/Quaternion.html

@@ -44,6 +44,13 @@
 
 		<h2>Properties</h2>
 
+		<h3>[property:Boolean isQuaternion]</h3>
+		<p>
+			Used to check whether this or derived classes are Quaternions. Default is *true*.<br /><br />
+
+			You should not change this, as it is used internally for optimisation.
+		</p>
+
 		<h3>[property:Float x]</h3>
 		<p>Changing this property will result in [page:.onChangeCallback onChangeCallback] being called.</p>
 

docs/api/en/textures/Texture.html

@@ -55,6 +55,13 @@
 		as long as video is playing - the [page:VideoTexture VideoTexture] class handles this automatically.
 		</p>
 
+		<h3>[property:Boolean isTexture]</h3>
+		<p>
+			Used to check whether this or derived classes are Textures. Default is *true*.<br /><br />
+
+			You should not change this, as it is used internally for optimisation.
+		</p>
+
 		<h3>[property:array mipmaps]</h3>
 		<p>
 		Array of user-specified mipmaps (optional).

docs/api/zh/math/Quaternion.html

@@ -44,6 +44,13 @@
 
 		<h2>Properties</h2>
 
+		<h3>[property:Boolean isQuaternion]</h3>
+		<p>
+			Used to check whether this or derived classes are Quaternions. Default is *true*.<br /><br />
+
+			You should not change this, as it is used internally for optimisation.
+		</p>
+
 		<h3>[property:Float x]</h3>
 		<p>Changing this property will result in [page:.onChangeCallback onChangeCallback] being called.</p>
 
@@ -290,4 +297,4 @@ q.slerp( qb, t )
 
 		[link:https://github.com/mrdoob/three.js/blob/master/src/[path].js src/[path].js]
 	</body>
-</html>
+</html>

docs/api/zh/textures/Texture.html

@@ -54,6 +54,14 @@
 		并在视频播放时不断地更新这个纹理贴图。——[page:VideoTexture VideoTexture] 类会对此自动进行处理。
 		</p>
 
+		<h3>[property:Boolean isTexture]</h3>
+		<p>
+			用于测试这个类或者派生类是否为Texture，默认为*true*。<br /><br />
+
+			你不应当对这个属性进行改变,因为它在内部使用，以用于优化。
+		</p>
+
+
 		<h3>[property:array mipmaps]</h3>
 		<p>
 		用户所给定的mipmap数组（可选）。