add paint method

README.md

@@ -109,6 +109,7 @@ or clone the repo:
     - morph
     - negative
     - noise
+    - paint
 
 
 ## Node version

examples/paint.js

@@ -0,0 +1,10 @@
+var gm = require('../gm')
+  , dir = __dirname + '/imgs'
+
+gm(dir + '/original.png')
+  .paint(2)
+  .write(dir + '/paint.jpg', function(err){
+    if (err) return console.dir(arguments)
+    console.log(this.outname + ' created :: ' + arguments[3])
+  }
+) 

lib/args.js

@@ -204,6 +204,12 @@ module.exports = function(proto){
       return this.arg(null, ["-noise", radius])
     return this.arg(null, ["+noise", radius])
   }
+
+  // http://www.graphicsmagick.org/GraphicsMagick.html#details-paint
+  proto.paint = function(radius){
+    return this.arg(null, ["-paint", radius])
+  }
+
 }
 
 function comment(arg){