Add-on New options to custom RM fields

[Robert9]

When i add new custom fields for the RM i want to have more options

1. option to have an unvisible field for the resource owner and the visitor , nobody can see this field
2. option to have an editable field for the resource owner, but invisible for the visitor; not visible for visitors
3. just one Integer (internal use and useable in the templates
4. another Integer (internal use and useable in the templates