Add library_proxy to index, tidy up mouse demo

Author: monkstone

README.md

@@ -35,6 +35,7 @@ Like the original `ruby-processing`, `JRubyArt` is like a DSL for vanilla `proce
     2. [vecmath][]
     3. [control-panel][]
     4. [video][]
+    5. [library proxy][]
 
 4. Gems
    1. [PBox2D][pbox2d]
@@ -74,6 +75,7 @@ Like the original `ruby-processing`, `JRubyArt` is like a DSL for vanilla `proce
 [vecmath]:https://github.com/ruby-processing/JRubyArt-examples/tree/master/processing_app/library/vecmath
 [video]:https://github.com/ruby-processing/JRubyArt-examples/tree/master/processing_app/library/video
 [control-panel]:https://github.com/ruby-processing/JRubyArt-examples/tree/master/contributed/jwishy.rb
+[library proxy]:https://github.com/ruby-processing/JRubyArt-examples/tree/master/processing_app/library/library_proxy
 [PBox2D]:https://github.com/ruby-processing/JRubyArt-examples/tree/master/external_library/ruby_gem/jbox2d
 [hype]:https://github.com/ruby-processing/JRubyArt-examples/tree/master/external_library/java/hype
 [hemesh]:https://github.com/ruby-processing/JRubyArt-examples/tree/master/external_library/java/hemesh

processing_app/library/library_proxy/library/mouse_thing/mouse_thing.rb

@@ -11,8 +11,8 @@ def draw
   def mouseEvent(event)
     case event.action
     when MouseEvent::CLICK
-      # puts 'CLICK'
-      app.send :puts, event.toString
+      fstring = 'CLICK at x = %.1f, y = %.1f'
+      puts format(fstring, event.x, event.y)
     when MouseEvent::DRAG
       puts 'DRAG'
     when MouseEvent::WHEEL