Add TeleportCause.COMMAND for inbuilt /tp

nms-patches/CommandTp.patch

@@ -22,6 +22,15 @@
                  }
              }
          }
+@@ -107,7 +101,7 @@
+             }
+ 
+             entity.stopRiding();
+-            ((EntityPlayer) entity).playerConnection.a(commandabstract_commandnumber.b(), commandabstract_commandnumber1.b(), commandabstract_commandnumber2.b(), f, f1, enumset);
++            ((EntityPlayer) entity).playerConnection.a(commandabstract_commandnumber.b(), commandabstract_commandnumber1.b(), commandabstract_commandnumber2.b(), f, f1, enumset, org.bukkit.event.player.PlayerTeleportEvent.TeleportCause.COMMAND); // CraftBukkit
+             entity.h(f);
+         } else {
+             float f2 = (float) MathHelper.g(commandabstract_commandnumber3.a());
 @@ -126,10 +120,17 @@
      }