find_unused KeyError

```
(cloudmapper) root@f9efb2165ca6:/opt/cloudmapper# python cloudmapper.py find_unused --account YOUR_ACCOUNT
Traceback (most recent call last):
File "cloudmapper.py", line 72, in
main()
File "cloudmapper.py", line 66, in main
commands[command].run(arguments)
File "/opt/cloudmapper/commands/find_unused.py", line 13, in run
unused_resources = find_unused_resources(accounts)
File "/opt/cloudmapper/shared/find_unused.py", line 123, in find_unused_resources
find_unused_elastic_ips(region),
File "/opt/cloudmapper/shared/find_unused.py", line 70, in find_unused_elastic_ips
unused_ips.append({"id": ip["AllocationId"], "ip": ip["PublicIp"]})
KeyError: 'AllocationId'
```