diff --git a/.gitignore b/.gitignore
index 3c35dbe..dbaec26 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,5 @@
+build
+pkg
 tmp
 .DS_Store
 test/public/retina.js
\ No newline at end of file
diff --git a/build/retina.js b/build/retina.js
deleted file mode 100644
index b38b9cf..0000000
--- a/build/retina.js
+++ /dev/null
@@ -1,41 +0,0 @@
-(function() {
-
-  if (window.devicePixelRatio > 1) {
-    window.onload = function() {
-      var image, is_external, load, _i, _len, _ref, _results;
-      is_external = function(href) {
-        return !!(href.match(/^https?\:/i) && !href.match(document.domain));
-      };
-      _ref = document.getElementsByTagName("img");
-      _results = [];
-      for (_i = 0, _len = _ref.length; _i < _len; _i++) {
-        image = _ref[_i];
-        _results.push((load = function() {
-          var at_2x_path, extension, height, http, path, path_segments, path_without_extension, width;
-          if (!image.complete) {
-            return setTimeout(load, 5);
-          } else {
-            path = image.getAttribute("src");
-            if (is_external(path)) return;
-            width = image.offsetWidth;
-            height = image.offsetHeight;
-            path_segments = path.split('.');
-            path_without_extension = path_segments.slice(0, path_segments.length - 1).join(".");
-            extension = path_segments[path_segments.length - 1];
-            at_2x_path = "" + path_without_extension + "@2x." + extension;
-            http = new XMLHttpRequest();
-            http.open('HEAD', at_2x_path, false);
-            http.send();
-            if (http.status === 200) {
-              image.setAttribute('width', width);
-              image.setAttribute('height', height);
-              return image.setAttribute("src", at_2x_path);
-            }
-          }
-        })());
-      }
-      return _results;
-    };
-  }
-
-}).call(this);
diff --git a/pkg/retina.zip b/pkg/retina.zip
deleted file mode 100644
index 59dea7d..0000000
Binary files a/pkg/retina.zip and /dev/null differ