Use @license in the copyright/license header. [closes #138]

Former-commit-id: 3b924dad24d56e0fd33e4df1341b09c6165521a1

build/minify.js

@@ -204,6 +204,7 @@
       // restrict lines to 500 characters for consistency with the Closure Compiler
       var stream = uglifyJS.OutputStream({
         'ascii_only': true,
+        'comments': true,
         'max_line_len': 500,
       });