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This module provides basic functions for handling mime-types. It can handle
matching mime-types against a list of media-ranges. See section 14.1 of
the HTTP specification [RFC 2616] for a complete explanation.

   http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.1

Based on mimeparse 0.1.2 by Joe Gregorio:

    http://code.google.com/p/mimeparse/

Contents:
    - parse_mime_type():   Parses a mime-type into its component parts.
    - parse_media_range(): Media-ranges are mime-types with wild-cards and a 'q' quality parameter.
    - quality():           Determines the quality ('q') of a mime-type when compared against a list of media-ranges.
    - quality_parsed():    Just like quality() except the second parameter must be pre-parsed.
    - best_match():        Choose the mime-type with the highest quality ('q') from a list of candidates.
    - desired_matches():   Filter against a list of desired mime-types in the order the server prefers.

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Carves up a mime-type and returns a tuple of the
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       For example, the media range 'application/xhtml;q=0.5' would
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Carves up a media range and returns a tuple of the
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       get parsed into:

       ('application', '*', {'q', '0.5'})

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Find the best match for a given mime-type against
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Find the best match for a given mime-type against
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    declare a set of desired mime-types it supports, and returns a subset of
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    >>> desired_matches(['text/html', 'application/xml'],     ...     'text/xml,application/xml,application/xhtml+xml,text/html;q=0.9,text/plain;q=0.8,image/png')
    ['text/html', 'application/xml']
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