Removed spaces from top-level directory names.

Spaces tend to cause annoyances in a Unix-style shell environment.
This change fixes that.

04_Awari/java/AwariGame.java

@@ -0,0 +1,5 @@
+public class AwariGame {
+    public static void main(String[] args) {
+        Awari awari = new Awari();
+    }
+}