Add programmatically way to create security groups

tested on AWS EC2
Merge branch 'master' into feature/add-security-groups

Conflicts:
	docker/src/main/java/brooklyn/entity/container/docker/DockerHostSshDriver.java
Support both configuration and auto-creation of security groups
Merge pull request #32 from brooklyncentral/feature/add-security-groups

Add programmatically way to create security groups