add doc for the attributes
add doc for the attributes

juliandunn/mixlib-shellout,chef/mixlib-shellout,docwhat/mixlib-shellout,BackSlasher/mixlib-shellout,docwhat/mixlib-shellout,chef/mixlib-shellout,BackSlasher/mixlib-shellout,juliandunn/mixlib-shellout,Nordstrom/mixlib-shellout