added sources for Slick

Former-commit-id: 1647fa32ef6894bd7db44f741f07c2f4dcdf9054
Former-commit-id: 0e5810dcfbe1fd59b13e7cabe9f1e93c5542da2d

lib/slick-source/org/newdawn/slick/command/Command.java

@@ -0,0 +1,12 @@
+package org.newdawn.slick.command;
+
+/**
+ * The description of a action feedback from the abstract input system. This marker allows the
+ * creation of action objects that can contain useful state. If you don't need state and just
+ * a name use <code>BasicCommand</code.
+ *
+ * @author kevin
+ */
+public interface Command {
+
+}