Bump version for trial release
Note in docs that Parallel::ForkManager is required for parallel test runs
Add more spelling stopwords
Allow Makefile.PL and README.md to be dirty when doing a release

They'll be committed after the release is done
v0.55

        * A number of deprecations and backwards incompatible changes in this
          release!
        * Calling runtests() on Test::Class::Moose or a subclass of that class
          is now deprecated. Use the new Test::Class::Moose::Runner class
          instead.
        * The Test::Class::Moose::Role::Parallel role no longer does
          anything. You can use the Test::Class::Moose::Runner class to run
          tests in parallel by passing a jobs parameter to its
          constructor. See the docs for details.
        * Parallel testing is now done _per test class instance_ rather than
          per method. In other words, each subprocess instantiates a test
          class and runs all of its test methods.
        * You can now run multiple instances of a test class by using the
          Test::Class::Moose::Role::ParameterizedInstances role. See the
          Test::Class::Moose docs for details.
        - All private methods defined as lexically-scoped variables in
          Test::Class::Moose have been made actual methods so that roles and
          subclasses can affect them.
        - Removed MooseX::ClassAttribute from the list of prereqs in
          Makefile.PL. Test::Class::Moose loaded this but never used it.