Update ViewHandler to return content of response code is 202 Accepted

If you have a view with statuscode 201, the content is ignored. This is wrong - it should work in the same manner as responses for 201 - Created.

From the RFC (http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html):
> 10.2.3 202 Accepted
> [...] The entity returned with this response SHOULD include an indication of the request's current status and either a pointer to a status monitor or some estimate of when the user can expect the request to be fulfilled.

This pull request allows that.