TODO

Support multi-object delete
'Recursive' delete? (Using a prefix)
In s3ls, XML parsing should populate a data structure to be printed, rather than printing directly
	this would allow more formatting and sorting options
	output would not begin to appear until all results collected, however
		sometimes undesirable when listing large 'directories'
		might include a flag to return to an 'online' output system
Allow regions besides "us-east-1"
Figure out whether anything should be done to support 'virtual host style'
Support setting bucket permissions?
Support range GET requests

If an S3 feature is supported by neither Ceph nor Minio, implementing it in this code is not very interesting. 
Ceph features: http://docs.ceph.com/docs/hammer/radosgw/s3/#features-support
Minio features: https://github.com/minio/minio/blob/135a6a7bb4d80fb7eb2f23df331f652f1b1d8a33/docs/minio-limitations.md

Feature				Ceph		Minio		This Code
List Buckets			Supported	Supported	Supported
Delete Bucket			Supported	Supported	Supported
Create Bucket			Supported	Supported	Supported
Bucket Lifecycle		Not Supported	Not Supported	Not Supported
Policy (Buckets, Objects)	Not Supported	Supported?	Not Supported
Bucket Website			Not Supported	Not Supported	Not Supported
Bucket ACLs (Get, Put)		Supported	Not Supported	Not Supported
Bucket Location			Supported	Supported	Supported
Bucket Notification		Not Supported	?		Not Supported
Bucket Object Versions		Supported	Not Supported	Not Supported
Get Bucket Info (HEAD)		Supported	Not Supported?	Not Supported
Put Object			Supported	Supported	Supported
Delete Object			Supported	Supported	Supported
Get Object			Supported	Supported	Supported
Object ACLs (Get, Put)		Supported	Not Supported	Not Supported
Get Object Info (HEAD)		Supported	?		Not Supported
POST Object			Supported	?		Not Supported
Copy Object			Supported	Supported	Supported
Multipart Uploads		~Supported	?		Not Supported