Fixed "unknown command" on vanilla commands with no args (even though it's intended behavior...)

src/main/java/org/bukkit/command/defaults/TimeCommand.java

@@ -59,6 +59,6 @@ public class TimeCommand extends VanillaCommand {
 
     @Override
     public boolean matches(String input) {
-        return input.startsWith("time ");
+        return input.startsWith("time ") || input.equalsIgnoreCase("time");
     }
 }