bump and hide build dir for publish

.npmignore

 binding.gyp
+build

package.json

@@ -2,7 +2,7 @@
   "author": "Andrew Nesbitt <andrewnez@gmail.com> (http://andrew.github.com)",
   "name": "node-sass",
   "description": "wrapper around libsass",
-  "version": "0.2.3",
+  "version": "0.2.4",
   "homepage": "http://github.com/andrew/node-sass",
   "main": "./sass.js",
   "repository": {