Updates to AwsS3Library – Bucket contents support

Posted updates and fixes to the AwsS3Library. Added support for AwsBucket Contents to be parsed when getting a bucket.

AwsBucket bucket = _service.Get(new AwsBucket("somebucket"));
foreach (AwsObjectKey awsObjectKey in bucket.AwsObjectKeys)
{
    Console.WriteLine("Object Key " + awsObjectKey.Key);
}