Add "local" network to run multiple VMs on a PC

[nielsreijers]

Add a new "radio" that will just be able to communicate with other VMs running on the same PC, so we can test a whole network locally. Step 1

• add a new radio implementation to the VM
• create a simple server to deliver messages from one VM to the other Step 2
• change the master to connect to the local radio server instead of zwave