Add xml for layman

Signed-off-by: Luca Fulchir <luker@codepedia.eu>

repositories.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE repositories SYSTEM "/dtd/repositories.dtd">
+<repositories encoding="unicode" version="1.1">
+  <repo priority="50" quality="experimental" status="unofficial">
+    <name>Wheatley</name>
+    <description>A stupid Gentoo overlay</description>
+    <homepage>https://github.com/LucaFulchir/Wheatley</homepage>
+    <owner>
+      <email>luker@codepedia.eu</email>
+      <name>Luca Fulchir</name>
+    </owner>
+    <source type="git">https://github.com/LucaFulchir/Wheatley.git</source>
+    <source type="git">https://www.codepedia.eu/Luker/Wheatley.git</source>
+  </repo>
+</repositories>