Reorganization of the PGL regulations (#50)

Released/Gen 7/PGL Regulations/README.md

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+## PGL Regulations
+### What is this?
+These are rules, downloaded from the _Festival Plaza_, that you can chose to use in wireless battles against your friends.
+
+### How do I use this?
+- export your games _extdata_ with a save manager like [Checkpoint](https://github.com/FlagBrew/Checkpoint/releases/latest) or [JKSM](https://github.com/J-D-K/JKSM/releases/latest)
+- in the _extdata_ navigate to the folder `/user/reg`, this is where regulation files are stored
+- chose regulation files for your language and rename them to match the naming scheme (see below)
+- import the _extdata_ back into your game
+
+### Naming scheme
+You can have up to 12 regulations at the same time. The files get numbered in the order you downloaded them, starting with `012` and ending with `023`. So any other file name that does not match `012`, `013`, `...` , `023` will not be recognized by the game.