Add tag to dhcpoption
dhcpboot with less required parameters
Merge branches 'add_tag_dhcpoption' and 'required_params_dhcpboot'
Rename value to ip on ptr class and template
Merge pull request #10 from guimaluf/rename_ptr_value_to_ip

Rename ptr value to ip, dhcpboot with less params, tag to dhcpoption.