Merge pull request #166 from andylyall/develop

Refactor of AffinityGroup terminology
WIP: Adding SQL server and Postgres
Added SQL and PostgreSQL support, and dbproducts.json
Fixed duplicated engines bug
RDS: Added actual currency
FB 4877: First param in getLoadBalancerHealthCheck was incorrectly annotated as @Nullable
FB 4877: Second parameter is nullable and has to be checked before accessed to avoid NPE
Merge pull request #167 from maksimov/develop

Added SQL and PostgreSQL support, and dbproducts.json
launchMany implementation, take 1.
Merge pull request #170 from maksimov/develop

launchMany implementation, take 1.
Fix for enableForwarding being called twice.
Fix for enableForwarding being called twice.
Merge branch 'develop' of https://github.com/maksimov/dasein-cloud-aws into develop
launchMany implementation, take 2. Shaved off 10 seconds more.
launchMany implementation, take 2 - improved DescribeInstances.
Merge branch 'develop' of https://github.com/maksimov/dasein-cloud-aws into develop
launchMany implementation, take 3 - improved tags setting, fixed bugs.
Merge pull request #171 from maksimov/develop

launchMany implementation, further improvements.
StoragePool support
StoragePool support