Update CHANGELOG for 1.8.2
Update CHANGELOG for 1.8.2

iennae/users,gsaslis/users,iennae/users,justintime/users,site5/cookbook-users,jordant/users,ongmingyang/users,site5/cookbook-users,jordant/users,chef-cookbooks/users,opscode-cookbooks/users,gsaslis/users,wegtam/users,gleamicus/users,gleamicus/users,nkadel-skyhook/nkadel-chef-users,nkadel-skyhook/nkadel-chef-users,RobertNorthard/users,RobertNorthard/users,nickcharlton/users,pielu/users,ongmingyang/users,chef-cookbooks/users,justintime/users,pielu/users,FlorentFlament/users,FlorentFlament/users,wegtam/users,opscode-cookbooks/users,nickcharlton/users