Debug commands

Not fully tested. The ones tested do work, though.

src/main/java/WayofTime/bloodmagic/command/ISubCommand.java

@@ -0,0 +1,17 @@
+package WayofTime.bloodmagic.command;
+
+import net.minecraft.command.ICommand;
+import net.minecraft.command.ICommandSender;
+
+public interface ISubCommand {
+
+    String getSubCommandName();
+
+    ICommand getParentCommand();
+
+    String getArgUsage(ICommandSender commandSender);
+
+    String getHelpText();
+
+    void processSubCommand(ICommandSender commandSender, String[] args);
+}