Allow for Organization created trails

Normal CloudTrail logs are stored in:
```
s3://my_log_bucket/OPTIONAL_PREFIX/AWSLogs/111111111111/CloudTrail/
```

Organization CloudTrail logs are stored in:
```
s3://my_log_bucket/OPTIONAL_PREFIX/AWSLogs/o-ORGANIZATION_ID/111111111111/CloudTrail/
```

I need to account for that `o-ORGANIZATION_ID` sub-directory.

One method may be to have in the `config.yaml` the full path to the CloudTrail logs, such as:
```
accounts:
- name: demo
id: 111111111111
iam: account-data/demo_iam.json
cloudtrail_logs: s3://my_log_bucket/OPTIONAL_PREFIX/AWSLogs/o-ORGANIZATION_ID/111111111111/CloudTrail/
``