//! This crate provides a media type parser which is gerneric over the specific grammar.
//! 
//! Depending on where media types appear they grammar can diff from small aspects (like
//! which characters are allowed win type, subtype and parameter names) to larger aspects
//! (like allowing comments and soft line brakes :=\ ).
//!
//! Intially this crate will provide impl. for Media Types in context of Http and such in 
//! context of Mime as well as a more strict parser for types which should be gennerally 
//! compatible with any grammar.
//!
//! Note that while media types often seem simple, they have a lot of tricky aspects, for examples
//! the semantics of parameter value comparsion depend on the actual parameter type, subtype
//! combination, which given that anyone can use custom types/register new ones, means it's not
//! possible to implement a general equality operation correctly. Because of the same reason in
//! context of the fact that any non appearing parameter has a default value  implementing a 
//! generally correct hashin function or even media-range matching function is not possible either.
//!
//! This crate tries to have the best trate off between "korrectness",  performance and depth of
//! implementaion (special knowledge for some media types, e.g. that "charset=utf-8" and
//! "charset=utf8" are equal). It tries to be easie to use for the most common use cases but at
//! the same time to have the needed flexibility/funcionallity for more complex use cases.