Add travis

[lorenz-halt]

You know the drill

[simonschmeisser]

and tests ...

[lorenz-halt]

Do you have any idea how to actually test?
We could start the node and test if it tries to connect? Anything else?

[simonschmeisser]

hmm, probably we would need a mock gripper (in python or something) that speaks the actual protocol and could then test certain situations ... would be a bit of work though