Add tables to describe each variables for out-of-order examples

[tatsuhiro-t]

This adds tables that show each variables when a packet is received for out-of-order packet examples. This would clarify what happens exactly for each packet reception and how algorithm works.

This clarifies my own comment at #248 (comment)
This might be redundant, but it would help understanding how algorithm works.

[mirjak]

Thanks for suggesting this. I will not merge that now but if more people provide feedback and think this helps, we can still merge this later as this is purely editorial!

[ianswett]

I find it a bit confusing to have two ways of expressing the same example, so I'd be inclined to settle on a single approach, but I don't have a strong opinion.

[tatsuhiro-t]

I think the PR has an advantage over the existing way of expressing examples because it does not require additional text to explain why ACK is needed. The table is self explanatory and it contains values calculated by the presented algorithm, and it helps readers understand how it works. That said, I am fine to close this if everyone is satisfied with the current examples.

[LPardue]

As a bit of an ack-frequency noobie, I prefer Tatsuhiro's table and going only with that qould work for me. Although, it's HTML rendering could use a few tweaks . I have a local change I'll create as a PR on top to show how I think we can improve things.