Added basic of jukebox rewrite

- Added jukebox mod, with updated API and beginning of rewriting

mods/jukebox/README.txt

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+Minetest mod "Jukebox"
+=======================
+version: 1.0
+
+License of source code and textures: WTFPL
+-----------------------------------------
+(c) Copyright BlockMen (2013)
+
+
+License of music: CC0
+---------------------
+The authors are : (freesound.org)
+-cheesepuff (song1)
+-geerterig (song2)
+-rap2h (song3)
+-keffstay (song4)
+-usedtobe (song5)
+-zagi2 (song6)
+
+This program is free software. It comes without any warranty, to
+the extent permitted by applicable law. You can redistribute it
+and/or modify it under the terms of the Do What The Fuck You Want
+To Public License, Version 2, as published by Sam Hocevar. See
+http://sam.zoy.org/wtfpl/COPYING for more details.
+
+
+Using the mod:
+--------------
+
+To use the jukebox, you have to craft one. You need 8 wood and 1 diamond to craft it following way:
+
+wood    wood    wood
+wood   diamond  wood
+wood    wood    wood
+
+
+Furthermore you need Music Discs, that you can craft following way:
+
+
+  -    coal     -
+coal   gold    coal
+  -    coal     -
+
+
+Just click with a music disc in your hand on the jukebox and it will play a random song. To stop the music
+rightclick the box again and it will drop the music disc.
+

mods/jukebox/depends.txt

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+default

mods/jukebox/init.lua

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+local discs = {
+	[1] = "track_1",
+}
+
+minetest.register_node("jukebox:box", {
+	description = "Jukebox",
+	drawtype = "nodebox",
+	tiles = {"jukebox_top.png", "default_wood.png", "jukebox_side.png",
+		"jukebox_side.png", "jukebox_front.png", "jukebox_front.png"},
+	paramtype = "light",
+	paramtype2 = "facedir",
+	stack_max = 1,
+	groups = {choppy=2,oddly_breakable_by_hand=2,flammable=2},
+	sounds = default.node_sound_wood_defaults(),
+	node_box = {
+		type = "fixed",
+		fixed = {-0.5, -0.5, -0.5, 0.5, 0.5, 0.5},
+	},
+	selection_box = {
+		type = "fixed",
+		fixed = {-0.5, -0.5, -0.5, 0.5, 0.5, 0.5},
+				
+	},
+	on_rightclick = function(pos, node, clicker, itemstack)
+		local meta = minetest.get_meta(pos)
+		local inv  = meta:get_inventory()
+		if not clicker then return end
+		if minetest.get_item_group(clicker:get_wielded_item():get_name(), "disc") == 1 then
+			-- Rewrite this
+		else
+			if not inv:is_empty("main") then
+				local drop_pos = minetest.find_node_near(pos, 1, "air")
+				if drop_pos == nil then drop_pos = {x=pos.x, y=pos.y+1,z=pos.z} end
+				minetest.add_item(drop_pos, inv:get_stack("main",1))
+				if meta:get_string("now_playing") then minetest.sound_stop(meta:get_string("now_playing")) end
+			end
+		end
+	end,
+	on_construct = function(pos)
+		local meta = minetest.get_meta(pos)
+		local inv = meta:get_inventory()
+		inv:set_size("main", 1)
+	end,	
+	on_destruct = function(pos)
+		local meta = minetest.env:get_meta(pos)
+		local inv = meta:get_inventory()
+		if not inv:is_empty("main") then
+			local drop_pos = minetest.find_node_near(pos, 1, "air")
+			if drop_pos == nil then drop_pos = {x=pos.x, y=pos.y+1,z=pos.z} end
+			minetest.add_item(drop_pos, inv:get_stack("main",1))
+			if meta:get_string("now_playing") then minetest.sound_stop(meta:get_string("now_playing")) end
+		end
+	end,
+})
+
+
+minetest.register_craftitem("jukebox:disc", {
+	description = "Music Disc",
+	inventory_image = "jukebox_disc.png",
+	liquids_pointable = false,
+	stack_max = 1
+
+})
+
+minetest.register_craft({
+	output = "jukebox:box",
+	recipe = {
+		{"group:wood", "group:wood", "group:wood", },
+		{"group:wood", "default:diamond", "group:wood", },
+		{"group:wood", "group:wood", "group:wood", }
+	}
+})
+
+minetest.register_craft({
+	output = "jukebox:disc",
+	recipe = {
+		{"", "default:coal_lump", "", },
+		{"default:coal_lump", "default:gold_lump", "default:coal_lump", },
+		{"", "default:coal_lump", "", }
+	}
+})