(doc) Update iis_feature type with doc
(doc) Update iis_feature type with doc

This updates the iis_feature type with doc comments

wilson208/puppetlabs-iis,puppetlabs/puppetlabs-iis,jpogran/puppetlabs-iis,wilson208/puppetlabs-iis,jpogran/puppetlabs-iis,puppetlabs/puppetlabs-iis