Add support to launch configuration `associate_public_ip_address` boto parameter
requirements.txt: Use temporarily a fork of boto that support AssociatePublicIpAddress
Update boto to a version that supports AssociatePublicIpAddress
Update moto to a version that supports AssociatePublicIpAddress
Update `sure` to a version that does not break autoscaler tests
Merge pull request #4 from spulec/associate-public-ip-address

Add support to launch configuration `associate_public_ip_address` boto parameter