Corrected dependencies in gemspec
Corrected dependencies in gemspec

nokogiri and rubyzip are runtime dependencies, not development dependencies

added action pack as dependency since action_controller and action_view is also used in the code
nickfrandsen/htmltoword,biremi/htmltoword,rafez/htmltoword,karnov/htmltoword,biremi/htmltoword,brightbytes/htmltoword,brightbytes/htmltoword,rafez/htmltoword,karnov/htmltoword,biremi/htmltoword,brightbytes/htmltoword