Allow printing of the parsed state of a media-type

[ThisIsMissEm]

E.g.,

console.dir( mediaType.fromString("image/svg+xml;charset=utf8;foo=bar") )

> { ... }

Rather than a String. This change would make debugging parsed objects easier, and the API more discoverable.

[lovell]

Great idea. In essence you'd like inspect() to return an object where currently toString() is re-used.

[ThisIsMissEm]

Yup! Not sure how to implement this though, I did try earlier.

[lovell]

console.dir() explicitly prevents the use of custom inspect() methods.

I'm thinking a minor API change is probably the best way to support this, renaming toString() to be the slightly more fluent asString(). This would then allow util.inspect() to use its built-in object inspection.