webbit/webbit — pull request #112 by pk11 (2013-02-24 22:13:28+00:00)
Title:  introducing cache control headers + updating flashchatroom sample

StaticFileHandler: introducing cache control headers
* adding `ETag`
* adding `Cache-Control` (optional)
* adding `Last-Modified`
* handling `If-Modified-Since`
* adding swf `Content-Type`

also, upgrading the `flashchatroom` sample