Update package description
move example code to separage package
Fix signature sorting of common prefix keys.

The AwzHeaders need to be sorted by key, not
key+value.
configurable http client
always close the response body
don't hold on to unneeded buffers
comment style
one more AmazonBucket example
s3util: list files and directories
Slightly rework amazon bucket subdomain manipulation. Fixes #19
Add restore to the list of canonicalized sub resources.