Temporary fix for OOM errors occuring in DescribeImages. Fix for NPE in SNS.
Updated to core 2013.03.2
Fixed incorrect return value from request method. This fixes tests and leaking IP addresses and VPCs.
Optimisations in SecurityGroup code
Fixed a few issues with tests.
Merge pull request #111 from maksimov/develop

Temporary fix for OOM errors occuring in DescribeImages. Fix for NPE in ...