Add lua controlled tube (#199)

* add lua controlled tube

* make textures and fix some bugs

Author: Desour

LICENSE

@@ -500,3 +500,194 @@ necessary.  Here is a sample; alter the names:
   Ty Coon, President of Vice
 
 That's all there is to it!
+
+
+--------------------------------------------------------------------------------
+
+Some code in lua_tube.lua is copied from The Mesecons Mod for Minetest:
+
+License of source code
+----------------------
+Copyright (C) 2011-2016 Mesecons Mod Developer Team and contributors
+
+This program is free software; you can redistribute the Mesecons Mod and/or
+modify it under the terms of the GNU Lesser General Public License version 3
+published by the Free Software Foundation.
+
+This library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with this library; if not, write to the
+Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
+Boston, MA  02110-1301, USA.
+
+
+GNU LESSER GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+
+  This version of the GNU Lesser General Public License incorporates
+the terms and conditions of version 3 of the GNU General Public
+License, supplemented by the additional permissions listed below.
+
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+

default_settings.lua

@@ -22,6 +22,7 @@ local settings = {
 	enable_mese_sand_tube = true,
 	enable_one_way_tube = true,
 	enable_priority_tube = true,
+	enable_lua_tube = true,
 	enable_cyclic_mode = true,
 	drop_on_routing_fail = false,
 

init.lua

@@ -119,6 +119,7 @@ if pipeworks.enable_redefines then
 	dofile(pipeworks.modpath.."/compat-furnaces.lua")
 end
 if pipeworks.enable_autocrafter then dofile(pipeworks.modpath.."/autocrafter.lua") end
+if pipeworks.enable_lua_tube then dofile(pipeworks.modpath.."/lua_tube.lua") end
 
 minetest.register_alias("pipeworks:pipe", "pipeworks:pipe_110000_empty")