add credentials to CouchDB

 On branch usr

	modified:   README.md
	modified:   Vagrantfile
	new file:   cookbooks/setup_server/attributes/default.rb
	modified:   cookbooks/setup_server/recipes/default.rb
	new file:   cookbooks/setup_server/templates/default/usr/local/etc/couchdb/local.d/admin-users.ini.erb