examples: add a script showcasing the internet module by converting…

… USD to EUR using live rates

examples/usd_to_euro/main.aspl

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+import internet
+import json
+import math
+
+var usd = math.round(double(input("Enter a value of $ you want to convert to €: ")), 2)
+var data = map<string, any>(json.decode(internet.get("http://open.er-api.com/v6/latest/USD").text)) // TODO: Use https here when it works
+var rates = map<string, float>(data["rates"])
+var rate = rates["EUR"]
+var euro = math.round(usd * rate, 2)
+print(usd + "$ ≙ " + euro + "€")