support volume and snapshot encryption, added in 2014-05-01 API
add CacheDNS to improve timeout problems
resolve conflicts
start support for version 4 signatures; but encapsulation not clear
moved signature 4 into own module; not nearly finished
adapt _canonical_request() to work with HTTP::Request objects
signature4 routines generate a match to Amazon POST example
version 4 signature signing now working
converted ebs to (mostly) use new parameter parsing API
not-very-good first try at making a basic S3 request
generate signed URLs for use in GET requests
moved AWS::Signature4 into its own module
can use either version 2 or version 4 signatures
Merge branch 'master' of git://github.com/lstein/LibVM-EC2-Perl

Conflicts resolved:
	lib/VM/EC2/REST/ebs.pm
	lib/VM/EC2/Snapshot.pm
	lib/VM/EC2/Volume.pm