[Basic Networking] existing Security Groups can be accessed by name
Support for creating Security Groups and ingress/egress rules from the Vagrantfile
Merge branch 'securityGroups' of github.com:nicolasbrechet/vagrant-cloudstack into nicolasbrechet-securityGroups

Conflicts:
	lib/vagrant-cloudstack/action/run_instance.rb
	lib/vagrant-cloudstack/config.rb
	spec/vagrant-cloudstack/config_spec.rb