Simplify the custom endpoint documentation

Size is an optional parameter, and its use should be obvious.

Author: rylnd

README.md

@@ -37,9 +37,7 @@ Assuming your server lives at `myserver.com`, and you've configured the middlewa
     * returns an avatar for the provided `id` at the specified `size`
     * size cannot exceed 400px
 * `myserver.com/myAvatars/face/:eyes/:nose/:mouth/:color/:size?`
-    * Allows you to generate a custom avatar from the specified parts and color
-    * e.g. `myserver.com/myAvatars/face/eyes1/nose2/mouth4/DEADBF`
-    * You can also set the size of your custom avatar
+    * Allows you to generate a custom avatar from the specified parts and color, and size
     * e.g. `myserver.com/myAvatars/face/eyes1/nose2/mouth4/DEADBF/300`
 * `myserver.com/myAvatars/list`
     * returns JSON of all valid parts for the custom endpoint above