Planviz to provide the (non-default) option of verbose display of TPN activities

[dcerys]

In the future, PLANVIZ will be the one that manages the verbosity of the activity name, where it will default to :display-name with args (see #55 )
Optionally, PLANVIZ (based on a user setting) can display the verbose version (intended to be used by a developer working on her plant implementation).

Let’s pick a simple layout for this verbose string.
If we have a plant-part, we must also have a plant-id defined for the activity. However, it is possible to have an activity with a plant-id, without a plant-part. Also, we’ll always have an interface if we have a plant-id. Finally, I suppose we can have an interface without a plant-id.
However, there are some default values that we may or may not want to make explicit at the Pamela TPN-generation level: The default value of plant-id is “plant”, and the default value of interface is “RMQ”.
So the possible combinations are:
<activity> <plant-part> <plant-id> <interface>
<activity> <plant-id> <interface>

Since there is a natural concept hierarchy here, let’s keep the delimiters simple, and use email and DNS conventions (“@" and “.” delimiters). This gives us:
<activity>@<plant-part>.<plant-id>.<interface> (e.g., "rotate-wheel(200)@left-front-wheel.vehicle1.RMQ”)
<activity>@<plant-id>.<interface> (e.g., “move-to(2,3)@vehicle1.RMQ”)

[dcerys]

Some of this capability (e.g., plant-id) is available on the ToolTip, minimizing the priority of this enhancement.