[#3] documente package

src/main/java/fr/unistra/mathinfo/gl/tp/demo/package-info.java

+/**
+ * <strong>Fizz buzz</strong>
+ * <small>From Wikipedia, the free encyclopedia</small>
+ * <p>Fizz buzz is a group word game for children to teach them about division.
+ *    Players take turns to count incrementally, replacing any number divisible
+ *     by three with the word "fizz", and any number divisible by five with the word "buzz".
+ * </p>
+ * <p>Players generally sit in a circle.
+ * The player designated to go first says the number "1",
+ * and the players then count upwards in turn.
+ * However, any number divisible by three is replaced by the word fizz
+ * and any number divisible by five by the word buzz.
+ * Numbers divisible by 15 become fizz buzz.
+ * A player who hesitates or makes a mistake is eliminated from the game.
+ * </p>
+ * <p>For example, a typical round of fizz buzz would start as follows:
+ * 1, 2, Fizz, 4, Buzz, Fizz, 7, 8, Fizz, Buzz, 11, Fizz, 13, 14, Fizz Buzz,
+ *  16, 17, Fizz, 19, Buzz, Fizz, 22, 23, Fizz, Buzz, 26, Fizz, 28, 29,
+ *  Fizz Buzz, 31, 32, Fizz, 34, Buzz, Fizz, ...
+ * </p>
+ */
+package fr.unistra.mathinfo.gl.tp.demo;