Decodes a string of key-value pairs from data and returns a comma separated string of keys and values. Note that keys will be in the even positions and values in the odd positions, such that if is the index of a key, its corresponding value will be at index in the resulting string.

When the function is called with:

wasKeyValueToCSV("position=<1,1,0>&toggle=on");

it will return the string:

"position", "<1,1,0>", "toggle", "on"

///////////////////////////////////////////////////////////////////////////
//    Copyright (C) 2013 Wizardry and Steamworks - License: CC BY 2.0    //
///////////////////////////////////////////////////////////////////////////
string wasKeyValueToCSV(string data) {
    return llList2CSV(llParseString2List(data, ["&", "="], []));
}

///////////////////////////////////////////////////////////////////////////
//    Copyright (C) 2014 Wizardry and Steamworks - License: CC BY 2.0    //
///////////////////////////////////////////////////////////////////////////
/// <summary>
///     Serialises key-value tuples from data to comma-separated values.
/// </summary>
/// <param name="data">the data containing key-value pairs</param>
/// <returns>a comma-separated string</returns>
private static string wasKeyValueToCSV (string data)
{
	return string.Join (",",
		data.Split ('&')
		.Select (p => p.Split ('=')).SelectMany (p => p)
		.ToArray ());
}