Log Message:
Update ruby-mime-types to 2.6.2.

== 2.6.2 / 2015-09-13

* Bugs:
  * Emilio Losada (@losadaem) fixed an error where +each_with_object+'s block
    parameters are the inverse of those used by +inject+. Resolves
    {#107}[https://github.com/mime-types/ruby-mime-types/issues/107] with pull
    request {#108}[https://github.com/mime-types/ruby-mime-types/pull/108].
  * Matt Beedle (@mattbeedle) fixed a typo in MIME::Type::Columnar negatively
    affecting people who use the +use_instead+ functionality. Resolved in
    {#109}[https://github.com/mime-types/ruby-mime-types/pull/109].
* Documentation:
  * Juanito Fatas (@JuanitoFatas) fixed a documentation issue with the README
    not properly linking internally on the generated rdoc source. Resolved with
    {#105}[https://github.com/mime-types/ruby-mime-types/pull/105].
* Development:
  * Fixed a minor issue in the IANA registry parser that would generate empty
    +text+ xrefs if the +text+ section was empty.