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

README.md

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+[modpack] Simple Shooter [shooter]
+====================================
+
+Mod Version: 0.6.0
+
+Minetest Version: 5.0.0 (engine & game)
+
+A simple first person shooter mod originally developed as part of a game that
+was never completed. Now distributed as a Minetest Game compatible mod-pack.
+
+[mod] Shooter API [shooter]
+---------------------------
+
+Depends: default
+
+Handles raycasting, blasting and audio-visual effects of dependent mods.
+
+[mod] Shooter Guns [shooter_guns]
+---------------------------------
+
+Depends: shooter
+
+Adds basic guns using the shooter API.
+
+[mod] Crossbow [shooter_crossbow]
+---------------------------------
+
+Depends: shooter, wool, dye
+
+Adds a crossbow with colored arrows.
+
+[mod] Flare Gun [shooter_flaregun]
+----------------------------------
+
+Depends: shooter, tnt, wool
+
+Adds a flare-gun with temporary light emitting flares.
+
+[mod] Grenade [shooter_grenade]
+-------------------------------
+
+Depends: shooter, tnt
+
+Adds simple hand grenades.
+
+[mod] Rocket Launcher [shooter_rocket]
+--------------------------------------
+
+Depends: shooter, tnt
+
+Adds rocket missiles and launching gun.
+
+[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.
+
+[mod] Turret Gun [shooter_turret]
+---------------------------------
+
+Depends: shooter_rocket
+
+Adds a mountable turret gun which can also be triggered by mesecon signals.
+Still WIP and experimental and may be subject to change or removal.