opsworks profile setup
pass in multiple groups for rds creation
create_stack can create any app type
standardize case of stack name (lower)
put IAM role creation into own function to return usable ARNs
make sure we have an RDS instance when we create a stack
functions for stop instance and add instance for use in delete_stack()
getec2instances parses OpsWorks tags
deploy_opsworks() can call layer and app level deployCommands. waits for deployment to finish as well
change default postgres engine type to 'postgres'. matches RDS engine type string
include notification_email and AWS creds in settings json
update ssh config to deal with opsworks settings
print red when deployment is not successful