https://github.com/Netflix/eureka/issues/62: Simplify EIP selection logic by relying completely on AWS to determine if an EIP is already being used by another instance.
Minor changes to comments.
Fix a minor bug with respect to logging information.
Merge pull request #65 from karthik-vn/master

https://github.com/Netflix/eureka/issues/62: Simplify EIP assignment logic.