Updated pig-latin README

[Baelyk]

Resolves #453:

I updated the README for the pig-latin exercise to correspond to the template in problem-specifications.

The update was discussed in the problem-specifications repo here.

[petertseng]

Thank you for this change. This is suitable.

Please include one of the words in https://help.github.com/articles/closing-issues-using-keywords/ when referencing #453, otherwise we may forget to close it and we do not want to forget.

Your link to exercism/problem-specifications#1171 (https://github.com/exercism/problem-specifications/pull/1171) is appreciated. Please amend the commit message so that it is in the commit message, so that one can see this without having to use GitHub (e.g. if I do not have an internet connection).

[Baelyk]

Like so?

[petertseng]

Fantastic, thank you!

I believe this change is uncontroversial (since CI is checking it for us) and obviously desirable (given the issue) so it is safe to merge it speedily.