Update AndroidEditor.java

Fixes #51: bad reference URLs on Windows.

Author: GKFX

src/processing/mode/android/AndroidEditor.java

@@ -287,7 +287,7 @@ public void actionPerformed(ActionEvent e) {
   public void showReference(String filename) {
     File javaReferenceFolder = Base.getContentFile("modes/java/reference");
     File file = new File(javaReferenceFolder, filename);
-    Base.openURL("file://" + file.getAbsolutePath());
+    Base.openURL(file.toURI().toString());
   }
 
 
@@ -503,4 +503,4 @@ public void run() {
       }
     }.start();
   }
-}
+}