Fix imagemagik package

package.json

@@ -13,6 +13,6 @@
     "serve-favicon": "~2.1.3",
     "debug": "~2.0.0",
     "jade": "~1.6.0",
-    "node-imagemagick": "0.1.3"
+    "imagemagick": "0.1.3"
   }
 }