Adding update mechanism

LaunchInstall.lua

@@ -5,12 +5,18 @@
 -- Installation bootstrap
 --
 
+local basicFiles = {
+	["Launch.lua"] = "https://raw.githubusercontent.com/Openarl/PathOfBuilding/master/Launch.lua",
+	["Update.lua"] = "https://raw.githubusercontent.com/Openarl/PathOfBuilding/master/Update.lua",
+}
 local curl = require("lcurl")
-local outFile = io.open("Launch.lua", "wb")
-local easy = curl.easy()
-easy:setopt_url("https://raw.githubusercontent.com/Openarl/PathOfBuilding/master/Launch.lua")
-easy:setopt_writefunction(outFile)
-easy:perform()
-easy:close()
-outFile:close()
+for name, url in pairs(basicFiles) do
+	local outFile = io.open(name, "wb")
+	local easy = curl.easy()
+	easy:setopt_url(url)
+	easy:setopt_writefunction(outFile)
+	easy:perform()
+	easy:close()
+	outFile:close()
+end
 Restart()