Merge pull request #1346 from abayer/master

anyResourceId was actually filtering on any resource type instead
Address FindBugs errors
Merge pull request #1347 from maginatics/findbugs

Address FindBugs errors
EC2 Subnet added, with DescribeSubnets support initially.

No live tests currently - since we only have subnets (and for that
matter, only DescribeSubnets and not Create or Delete) so far, and not
VPC, we can't be sure there'll be a subnet to list against in the
first place. That's still to be done.