telefonicaid/Rush — pull request #226 by amagan (2013-12-18 09:46:58+00:00)
Title: Fix #224: Send content-length and content-type headers when needed. 

Content-Length header is now sent when a request is relayed. (if content-length header is already present, it won't be overwritten).
Content-Type header is now sent at httpcallback.
Tests has been modified too.
@mrutid
@XavierVal