Decide core exercies

[Average-user]

With all the v2 exercism going on, I think is pretty necessary to have core exercises that suit Prolog. Since there aren't much exercises implemented in the track yet someone in the Slack channel suggested that we should start with 7. I'll be filling and swapping exercises of this list as I think is best, but I encourage any suggestion about change it. What I'm not sure yet if it is possible to decide the exact order of this exercises, and in that case. how?

• 1 hello-world
• 2 queen-attack
• 3 sum-of-multiples
• 4 binary
• 5 isogram
• 6 spiral-matrix
• 7 dominoes

Isogram is a simple exercise, but I put it that up because as a mentor I wont approve solutions that do not take advantage of the declarative properties of Prolog.

As mentioned in #81 there are some problems with some of the tests. So when this list gets fixed, the chosen exercises should get priority in that issue. Probably I'll add a comment there when it happens

And next goal; assign proper difficulty levels

[Average-user]

Forgot to mention, if you remember exercises from other tracks that you think could benefit the understanding of Prolog, and they are not yet implemented let me know, or submit a PR implementing them.

[Average-user]

This should also helps #66 to get done.

[Average-user]

Thanks to the track-anatomy tool this is no longer necessary