add pluralize method to component

[catmando]

pluralize is already available as part of ActiveSupport, but the equivalent text helper is not available.

I.e. "#{pluralize(Todo.active.count, 'item')} left"

generates either 1 item left or 2 items left etc...

[catmando]

closed. see hyper-component/spec/client_features/helpers_spec.rb:4 for example