cutter object added

User-Reference-Manual.md

@@ -162,11 +162,11 @@ ___
 * **Cutters** - supported types are now following:
 ![cutters](https://cloud.githubusercontent.com/assets/648108/12069447/ade1eefc-b006-11e5-937b-735102b35aa6.png)
   * Ballnose
-  * Cylinder
   * V-carve - width is the maximum width of the cone.
   * End
   * Sphere
-  * Custom - experimental 
+  * Custom - experimental ![custom cutter](https://cloud.githubusercontent.com/assets/648108/12069460/49848996-b007-11e5-8e88-9566915dbcb4.png)
+    * Cutter object - a 3D object of your choice available in the drop down list.
 
 * **Cutter diameter** - The exact diameter of the cutting tool.  This is used for calculating tool paths.  For a v-bit its the maximum diameter of the bit.
 * **Cutter flutes** - this parameter is used only for chipload computation.