std::from_str has been moved to std::str
Merge pull request #177 from jgillich/str

std::from_str has been moved to std::str
Added imports for enums, as per https://github.com/rust-lang/rust/pull/18973
Merge pull request #179 from kyledewey/enum_namespace_fix

Added imports for enums
Merge branch 'master' of https://github.com/chris-morgan/rust-http