Fix annoying typo in basic DynamoDB example

This actually makes the example copy&paste 'able

Thanks a lot!
Added SigV4 support to SNS.
Added release notes for v2.9.6.
Bumping version to 2.9.6
Implemented a high-level interface for selecting specific attributes and select=Count.
Add tests for specific attributes query
Fixed typo in boto.connection
Small test cleanup from the previous merge.
Updated RDS to use SigV4.