Update license and include source headers

Pass a deep copy of gunspec instead of a direct reference

Fix Lua style multi-line comments :/

Fix flaregun dependencies

Add mod.conf and description files plus some readme fixes

shooter_flaregun/README.txt

@@ -0,0 +1,28 @@
+Minetest Mod - Flare Gun [shooter_flaregun]
+===========================================
+
+Depends: shooter, tnt, wool
+
+Adds a flare-gun with temporary light emitting flares.
+
+Crafting
+========
+
+S = Steel Ingot  [default:steel_ingot]
+R = Red Wool     [wool:red]
+G = Gun Powder   [tnt:gunpowder]
+
+Flare: [shooter_flaregun:flare]
+
++---+---+
+| G | R |
++---+---+
+
+Flare Gun: [shooter_flaregun:flaregun]
+
++---+---+---+
+| R | R | R |
++---+---+---+
+|   |   | S |
++---+---+---+
+

shooter_flaregun/depends.txt

@@ -1,3 +1,3 @@
+shooter
 tnt
 wool
-shooter

shooter_flaregun/description.txt

@@ -0,0 +1 @@
+Adds a flare-gun with temporary light emitting flares.

shooter_flaregun/init.lua

@@ -1,3 +1,22 @@
+--[[
+Shooter Flare Gun [shooter_flaregun]
+Copyright (C) 2013-2019 stujones11, Stuart Jones
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU Lesser General Public License as published by
+the Free Software Foundation; either version 2.1 of the License, or
+(at your option) any later version.
+
+This program 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 Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public License along
+with this program; if not, write to the Free Software Foundation, Inc.,
+51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+]]--
+
 minetest.register_craftitem("shooter_flaregun:flare", {
 	description = "Flare",
 	inventory_image = "shooter_flare_inv.png",

shooter_flaregun/mod.conf

@@ -0,0 +1 @@
+name = shooter_flaregun