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_hook/README.txt

@@ -0,0 +1,32 @@
+Minetest Mod - Grapple Hook [shooter_hook]
+==========================================
+
+Depends: shooter, tnt
+
+Adds a teleporting grapple hook which can be thrown or launched
+further from a grapple hook gun.
+
+Crafting
+========
+
+S = Steel Ingot  [default:steel_ingot]
+D = Diamond      [default:diamond]
+
+Grappling Hook: [shooter_hook:grapple_hook]
+
++---+---+---+
+| S | S | D |
++---+---+---+
+| S | S |   |
++---+---+---+
+| D |   | S |
++---+---+---+
+
+Grappling Hook Gun: [shooter_hook:grapple_gun]
+
++---+---+
+| S | S |
++---+---+
+|   | D |
++---+---+
+

shooter_hook/depends.txt

@@ -1 +1,2 @@
+tnt
 shooter

shooter_hook/description.txt

@@ -0,0 +1 @@
+Adds a teleporting grapple hook and gun.

shooter_hook/init.lua

@@ -1,3 +1,22 @@
+--[[
+Shooter Grapple Hook [shooter_hook]
+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.
+]]--
+
 local function throw_hook(itemstack, user, vel)
 	local inv = user:get_inventory()
 	local pos = user:get_pos()

shooter_hook/mod.conf

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