Added DebugCommand, added support for 'subcommands'

lib/ui/commands/debug_command.rb

@@ -0,0 +1,31 @@
+class IMICFPS
+  class Commands
+    class DebugCommand < Command
+      def group
+        :global
+      end
+
+      def command
+        :debug
+      end
+
+      def setup
+        subcommand(:boundingboxes, :boolean)
+        subcommand(:wireframe, :boolean)
+        subcommand(:fps, :boolean)
+        subcommand(:stats, :boolean)
+        subcommand(:motd, :string)
+        subcommand(:mode, :integer)
+        subcommand(:gravity, :decimal)
+      end
+
+      def handle(arguments, console)
+        handle_subcommand(arguments, console)
+      end
+
+      def usage
+        string = "debug\n    #{@subcommands.map { |sub| sub.usage }.join("\n    ")}"
+      end
+    end
+  end
+end