CommandModule: make Command instance as a param

Together with the previous commit, this change will make the Command
instance receive a Context injection as part of the CommandModule's
injection -- something which was previously not possible.

Author: ctrueden

src/main/java/org/scijava/command/CommandModule.java

@@ -80,6 +80,7 @@ public class CommandModule extends AbstractModule implements Cancelable,
 	private final CommandInfo info;
 
 	/** The command instance handled by this module. */
+	@Parameter
 	private final Command command;
 
 	@Parameter