nickel-org/nickel.rs — pull request #54 by bguiz (2014-08-06 13:19:52+00:00)
Title: =BG= set default content type when not already set

Allows user to do `response.origin.headers.content_type = ...` within custom HTTP handlers.
Previously, this would simply be overwritten by `nickel::response::Response::set_headers()`.