add q function to ease creating Quality values (d68773c7)
adds re-parsing ability when getting typed headers (df756871)
hyper: switch to std::io, std::net, and std::path. (0fd6fcd7, closes #347)
Breaking Changes
added requirement that all HeaderFormat implementations
must also be fmt::Debug. This likely as easy as slapping
#[derive(Debug)] on to any custom headers.