add method to Zend\Http\Response\Stream
add method to Zend\Http\Response\Stream

the content length is now exposed with getters and setters
fixed phpdoc
change atrribute $this->contentlength to getContentLength()

Maks3w/zend-http,zendframework/zend-http,weierophinney/zend-http,asgrim/zend-http,netroby/zend-http,malinink/zend-http