jump_rule attribute added to simple_iptables_rule resource.

We need create chain, which contains some rules and send to it part of the traffic sometimes. jump_rule attribute  allows make this. Example:
simple_iptables_rule 'test' do
  rule '-p tcp --dport 80'
  jump_rule '-p tcp'
  jump 'ACCEPT'
end

This would generate the rules:
-A INPUT -p tcp -m tcp -j our_chain
-A our_chain -p tcp -m tcp --dport 80 -j ACCEPT