add docs per @WestLangley's request:...

add docs per @WestLangley's request: https://github.com/mrdoob/three.js/pull/5788#issuecomment-67857995

docs/api/math/Euler.html

@@ -91,6 +91,20 @@
     WARNING: this discards revolution information.
     </div>
 
+    <h3>[method:Euler setFromVector3]([page:Vector3 vector], [page:String order]) [page:Euler this]</h3>
+    <div>
+    vector -- [page:Vector3].
+    order -- [page:string] Order of axes, defaults to 'XYZ' (must be upper case)
+    </div>
+    <div>
+    Optionally Vector3 to the XYZ parameters of Euler, and order to the Euler's order property.
+    </div>
+
+    <h3>[method:Vector3 toVector3]()</h3>
+    <div>
+    Returns the Euler's XYZ properties as a Vector3.
+    </div>
+
     <h3>[method:Euler fromArray]([page:Array array]) [page:Euler this]</h3>
     <div>
     array -- [page:Array] of length 3 or 4. array[3] is an optional order argument.

docs/api/math/Matrix4.html

@@ -71,6 +71,16 @@
 		Copies the translation component of the supplied matrix *m* into this matrix translation component.
 		</div>
 
+		<h3>[method:Matrix4 makeBasis]( [page:Vector3 xAxis], [page:Vector3 zAxis], [page:Vector3 zAxis] ) [page:Matrix4 this]</h3>
+		<div>
+		Creates the basis matrix consisting of the three provided axis vectors.  Returns the current matrix.
+		</div>
+
+		<h3>[method:Matrix4 extractBasis]( [page:Vector3 xAxis], [page:Vector3 zAxis], [page:Vector3 zAxis] ) [page:Matrix4 this]</h3>
+		<div>
+		Extracts basis of into the three axis vectors provided.  Returns the current matrix.
+		</div>
+
 		<h3>[method:Matrix4 extractRotation]( [page:Matrix4 m] ) [page:Matrix4 this]</h3>
 		<div>
 		Extracts the rotation of the supplied matrix *m* into this matrix rotation component.