String of bytes into an int
<p>I want to convert a string like this into an int: <code>s = 'A0 00 00 00 63'</code>. What's the easiest/best way to do that?</p>

<p>For example <code>'20 01'</code> should become <code>8193</code> (2 * 16^3 + 1 * 16^0 = 8193).</p>
