Update README.md

Author: monkstone

README.md

@@ -6,18 +6,17 @@ Many of the vanilla processing example sketches have been translated to ruby-pro
 1. [Basic][]
 
     1. [structure][]
-    
     2. [objects][] 
 
 2. [Topics][]
 
     1. [shaders][]
-    
     2. [lsystems][]
 
 3. [Libraries][]
     1. [fastmath][]
     2. [vecmath][]
+    3. [control-panel][]
 
 [Basic]:https://github.com/ruby-processing/Example-Sketches/tree/master/samples/processing_app/basics
 [structure]:https://github.com/ruby-processing/Example-Sketches/tree/master/samples/processing_app/basics/structure
@@ -28,3 +27,4 @@ Many of the vanilla processing example sketches have been translated to ruby-pro
 [Libraries]:https://github.com/ruby-processing/Example-Sketches/tree/master/samples/processing_app/libraries
 [fastmath]:https://github.com/ruby-processing/Example-Sketches/tree/master/samples/processing_app/libraries/fastmath
 [vecmath]:https://github.com/ruby-processing/Example-Sketches/tree/master/samples/processing_app/libraries/vecmath
+[control-panel]:https://github.com/ruby-processing/Example-Sketches/tree/master/samples/processing_app/libraries/control-panel