updated docs to match code: monitor.use_private_ipv4 to monitor.use_local_ipv4; added monitor.master_address
add a note on monitor.master_address explaining that setting it will bypass any node search functionality builtin the cookbook
Merge pull request #8 from onehealth-cookbooks/attribute-doc-updates

updated README to match code: use_private_ipv4 to monitor.use_local_ipv4