switch from closure compiler to uglify

Author: evanw

Diff for: README.md

@@ -6,7 +6,7 @@ This library makes it easier to quickly prototype WebGL applications. It's lower
 
 * `python build.py`: build `lightgl.js` from the files in the `src` directory
 * `python build.py debug`: rebuild the library any time the contents of the `src` directory change
-* `python build.py release`: minify the library using Google Closure Compiler, which assumes there is a `closure` command in your path that runs `compiler.jar`
+* `python build.py release`: minify the library using [UglifyJS](https://github.com/mishoo/UglifyJS2), which assumes there is an `uglifyjs` command in your path
 * `docco src/*.js`: build the documentation, which is generated in the `docs` directory
 
 The latest lightgl.js build can be found at http://evanw.github.com/lightgl.js/lightgl.js.

Diff for: build.py

@@ -42,7 +42,7 @@ def build():
         os.write(f1, data)
         os.close(f1)
         os.close(f2)
-        os.system('closure --js %s --js_output_file %s' % (temp1_path, temp2_path))
+        os.system('uglifyjs "%s" -mo "%s"' % (temp1_path, temp2_path))
         os.remove(temp1_path)
         data = open(temp2_path).read()
         os.remove(temp2_path)