add an example of using hashed password strings to README
add an example of using hashed password strings to README

chef-cookbooks/database,seancoyne/database,GannettDigital/chef-database,chef-cookbooks/database,opscode-cookbooks/database,opscode-cookbooks/database,seancoyne/database,seancoyne/database,GannettDigital/chef-database,opscode-cookbooks/database