Add the variable register

README.md

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+A simple programming language written in LUA

interpreter.lua

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-print("Hello, World!")
+require("varreg.lua")

varreg.lua

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+local register = {}
+
+function Register_Variable(name, value, scopelevel)
+	register[name] = { value = value, scopelevel = scopelevel }
+end
+
+function Get_Variable(name)
+	return register[name]
+end
+
+function Unregister_Variable(name)
+	register.remove(name)
+end
+
+function Collect_Garbage(scopelevel)
+	for name, variable in ipairs(register) do
+		if variable[scopelevel] > scopelevel then
+			register.remove(name)
+		end
+	end
+end