Extract common method for fetching network interface id for instance
Skeleton implementation of ReleaseAddress
Skeleton (failing) test
Improved test
Merge branch 'master' into releaseaddress-ec2
Merge pull request #1194 from voidspace/releaseaddress-ec2

Environ.ReleaseAddress for ec2

Implements Environ.ReleaseAddress for the ec2 provider. This releases an IP address previously allocated with Environ.AllocateAddress.

(Review request: http://reviews.vapour.ws/r/504/)