now with flags and actions

Added region flag and actions instances and security-groups

Examples

• awstool -region us-west-1 instances - lists all instances in us-west-1 - note region flag must come before actions
• awstool security-groups - lists security groups with instances, sorted by instances
• awstool security-groups with-delete - same as above, but with AWS CLI commands to delete unused security groups (does not execute a delete)