Added a note about using Marshal for objects in Session
Added a note about using Marshal for objects in Session

minimul/quickbooks-ruby,prtkzoom/quickbooks-ruby,muhammad-abubakar/quickbooks-ruby,harvesthq/quickbooks-ruby,kashif-umair/quickbooks-ruby,raksonibs/quickbooks-extend,troysurrett/quickbooks-ruby-187,cohendvir/quickbooks-ruby,ratbeard/quickbooks-ruby,kmeister2000/quickbooks-ruby,ruckus/quickbooks-ruby,michaelcheung/quickbooks-ruby,ruckus/quickbooks-ruby,ruckus/quickbooks-ruby