[ANN] http_spew 0.5.0

[ANN] http_spew 0.5.0

[Eric Wong]

This release requires Ruby 2.1 or later.

13 changes since 0.4.1:

      gemspec: require kcar >= 0.3.1
      test/helper: explicit redirect for Ruby 2.0.0
      update packaging + docs (website)
      allow all future GPL versions
      add benchmark scripts
      relax dependency on unicorn
      declare empty classes with constant assignment
      test_upload: use object_id to check matches
      use frozen string literals for Ruby 2.1+
      merge into kcar project and mailing list
      dedicated mailing list
      rely on opt_str_freeze in more places
      use monotonic clock for timing