This is an important refactor of the way documentation generation works

* Installs luarocks WITH it's executable (easy to install other rocks if necessary)
* Use Lua supplied with luarocks
* Create Utils/luadocumentor.bat, which works with RELATIVE PATH ! -> Everybody can generate the doc
* Updated launch files accordingly

Utils/luarocks/systree/share/lua/5.1/pl/strict.lua

@@ -0,0 +1,71 @@
+--- Checks uses of undeclared global variables.
+-- All global variables must be 'declared' through a regular assignment
+-- (even assigning nil will do) in a main chunk before being used
+-- anywhere or assigned to inside a function.
+-- @class module
+-- @name pl.strict
+
+require 'debug'
+local getinfo, error, rawset, rawget = debug.getinfo, error, rawset, rawget
+local handler,hooked
+
+local mt = getmetatable(_G)
+if mt == nil then
+  mt = {}
+  setmetatable(_G, mt)
+elseif mt.hook then
+    hooked = true
+end
+
+-- predeclaring _PROMPT keeps the Lua Interpreter happy
+mt.__declared = {_PROMPT=true}
+
+local function what ()
+  local d = getinfo(3, "S")
+  return d and d.what or "C"
+end
+
+mt.__newindex = function (t, n, v)
+  if not mt.__declared[n] then
+    local w = what()
+    if w ~= "main" and w ~= "C" then
+      error("assign to undeclared variable '"..n.."'", 2)
+    end
+    mt.__declared[n] = true
+  end
+  rawset(t, n, v)
+end
+
+handler = function(t,n)
+  if not mt.__declared[n] and what() ~= "C" then
+    error("variable '"..n.."' is not declared", 2)
+  end
+  return rawget(t, n)
+end
+
+function package.strict (mod)
+    local mt = getmetatable(mod)
+    if mt == nil then
+      mt = {}
+      setmetatable(mod, mt)
+    end
+    mt.__declared = {}
+    mt.__newindex = function(t, n, v)
+        mt.__declared[n] = true
+        rawset(t, n, v)
+    end
+    mt.__index = function(t,n)
+      if not mt.__declared[n] then
+        error("variable '"..n.."' is not declared", 2)
+      end
+      return rawget(t, n)
+    end
+end
+
+if not hooked then
+    mt.__index = handler
+else
+    mt.hook(handler)
+end
+
+