title: Django compressor using gzip to serve javascript
body: <p>I am trying to serve gzip files from amazon s3.
  This is my settings.py:</p>
  
  <pre><code>AWS_IS_GZIPPED = True
  AWS_PRELOAD_METADATA = True 
  DEFAULT_FILE_STORAGE = 'storages.backends.s3boto.S3BotoStorage'
  STATICFILES_STORAGE = 'storages.backends.s3boto.S3BotoStorage'
  AWS_STORAGE_BUCKET_NAME = 'elasticbeanstalk-eu-west-1-2051565523'
  STATIC_URL = 'https://%s.s3.amazonaws.com/' % AWS_STORAGE_BUCKET_NAME
  COMPRESS_OFFLINE = True
  COMPRESS_ENABLED = True
  COMPRESS_URL = STATIC_URL
  COMPRESS_CSS_FILTERS = [
      'compressor.filters.css_default.CssAbsoluteFilter',
      'compressor.filters.cssmin.CSSMinFilter'
  ]
  COMPRESS_JS_FILTERS = [
      'compressor.filters.jsmin.JSMinFilter',
  ]
  COMPRESS_STORAGE = 'compressor.storage.GzipCompressorFileStorage' 
  </code></pre>
  
  <p>When I do this django creates *.gz files for every *.js and *.css compressed but strangely only the *.css files are served as gzip. I can see on the aws s3 that the .css files have the Content-Encoding: gzip and the *.js don't. What is going on here?</p>