refactored media encoding and interface - see NewEncoderJSON.
added support to multiple and mixed media type, for requests and responses.
removed Service.Encoding and Service.Filter; replaced with Service.Use.
added direct access to router with Service.Router.
refactored contentFilter for new media encodings.
updated FilterSecurity adding docs and removing clutter.
added initial HATEOAS support with OPTIONS, Link header and JSON-LD.
cleaned up responseWriter a bit, also responseBuffer.
changed Service.NewService to accept a full URI instead of just a path, more to come.
added and updated tons of the source docs.
arrggh typo