Added Percentile Dice as a rolleable dice

[RobinKuiper]

First of all, great code!

I've added "Percentile Dice" as a rolleable dice to the dice roller as a D100.

[mouse0270]

would you be able to tell me where I could test this merge?

[RobinKuiper]

Tomb of Annihilation has some percentile die rolls, here for example.

I will check if there are any in the basic rules.

Edit: Basic Rules - Divine Intervention

[RobinKuiper]

I made some more changes, and added different branches, will make a new pull request from the right branch,