s3util: list files and directories
Slightly rework amazon bucket subdomain manipulation. Fixes #19
Add restore to the list of canonicalized sub resources.
Add s3util.Delete function
Import paths kr -> sqs to avoid having to import packages from both paths in library users
Merge branch 'master' of github.com:sqs/s3

Conflicts:
	example_test.go
	s3util/example_test.go