Rust update: `std::vec_ng`->`std::vec` and `std::vec`->`std::slice` + removed unused imports
Rust update: `TcpStream::read_bytes` -> `TcpStream::read_exact`
Rust update: Switched to the new inner macro syntax, with a quick fix for the `headers_mod` macro
Merge pull request #69 from Ogeon/master

Rust updates: vec + slice, read_bytes and inner attributes