Implement the simulation

[vismate]

I'd like to link issue #38.

[vismate]

What I did so far:

• Added owner field and respective getter/setter to Port
• Nodes now keep track of their dependents (forming a higher level graph than individual ports)
• Changed how InputNode.connect(port) behaves: It now only connects to port, if it is in a disconnected state atm
• Implemented Node.triggerDonwlineUpdate() requested in #38
• Implemented Node.inCycle() requested in #38
• Wrote some tests to check the aforementioned methods' correctness
• Node dependency: Node.directDependencyOf(node), Node.transitiveDependencyOf(node)

On the linked branch you'll soon be able to see these changes. I highly consider this an experimental branch/solution so I request your ideas, alternatives and opinion on these changes.

[pszi]

• Changed how InputNode.connect(port) behaves: It now only connects to port, if it is in a disconnected state atm

This will alter behavior of my use of it in the view, it is easily fixable though, consider this only as a "note to self".

As for the rest, they will come extremely handy, thank you.

[vismate]

• Changed how InputNode.connect(port) behaves: It now only connects to port, if it is in a disconnected state atm

This will alter behavior of my use of it in the view, it is easily fixable though, consider this only as a "note to self".

As for the rest, they will come extremely handy, thank you.

I can also fix this issue on my side in 2 lines. At the time of writing the comment above it was easier to change the behaviour, especially because I though it would not affect anything.

Since then I have the infrastructure to change it back in no time.