error XML from EC2 API calls use RequestID instead of requestId, ELB uses RequestId
more fixes to properly handle request ID for ELB
bugfixes

Instance.pm		current_status would occasionally fail -- now retry a few times
elastic_ip.pm		AllocationId typo.  AllocationId cannot be simultaneously provided with PublicIp
SecurityGroup.pm	when protocol was -1 (ALL), revoke functions thought it was an argument