Reviewers: shindig.remailer_gmail.com, zhoresh, jtarrio,
Description: @see thread on [email protected] for discussion regarding the motivation for this CL (posting now) Please review this at http://codereview.appspot.com/1032042/show Affected files:java/gadgets/src/main/java/org/apache/shindig/gadgets/http/HttpResponseBuilder.java java/gadgets/src/main/java/org/apache/shindig/gadgets/rewrite/MutableContent.java
