depend on the version of Test::CleanNamespaces that was fixed for roles
tighten up entries
remove unneeded plugin
doc improvements
more references to other modules
add some keywords to metadata
bump requirement for TCN to latest
Dist-Zilla-Plugin-Test-CleanNamespaces-0.004

          - bump required version of Test::CleanNamespaces, to get fixes for
            Mouse, overloads, constants