Check for the compiled bindings in both places.

When node switched it's build system to GYP then the resulting bin
will be put in "Release" instead of "build". So check for both places with a
little `bindings.js` shim.

lib/bindings.js

@@ -0,0 +1,10 @@
+/**
+ * Compat for changes from node 0.4.x to 0.6.x.
+ */
+try {
+  module.exports = require('../build/Release/canvas');
+} catch (e) { try {
+  module.exports = require('../build/default/canvas');
+} catch (e) {
+  throw e;
+}}

lib/canvas.js

@@ -9,7 +9,7 @@
  * Module dependencies.
  */
 
-var canvas = require('../build/default/canvas')
+var canvas = require('./bindings')
   , Canvas = canvas.Canvas
   , Image = canvas.Image
   , cairoVersion = canvas.cairoVersion

lib/context2d.js

@@ -9,7 +9,7 @@
  * Module dependencies.
  */
 
-var canvas = require('../build/default/canvas')
+var canvas = require('./bindings')
   , Context2d = canvas.CanvasRenderingContext2d
   , CanvasGradient = canvas.CanvasGradient
   , ImageData = canvas.ImageData
@@ -320,4 +320,4 @@ Context2d.prototype.createImageData = function(width, height){
     width = width.width;
   }
   return new ImageData(new PixelArray(width, height));
-};
+};

lib/image.js

@@ -9,7 +9,7 @@
  * Module dependencies.
  */
 
-var Canvas = require('../build/default/canvas')
+var Canvas = require('./bindings')
   , Image = Canvas.Image;
 
 /**
@@ -57,4 +57,4 @@ Image.prototype.inspect = function(){
     + (this.src ? ' ' + this.src : '')
     + (this.complete ? ' complete' : '')
     + ']';
-};
+};

lib/pixelarray.js

@@ -9,7 +9,7 @@
  * Module dependencies.
  */
 
-var Canvas = require('../build/default/canvas')
+var Canvas = require('./bindings')
   , PixelArray = Canvas.CanvasPixelArray;
 
 /**