how to strip parent folder name and use just subdirectory names when zipping
<p>filesToInclude list has this data:</p>

<pre><code> c:/temp/folder1/data.1
 c:/temp/folder1/subfolder/data.1
 c:/temp/folder1/subfolder2/data.1
</code></pre>

<p>The following DotNetZip code stores the whole path starting with /temp/  but I like to store just /folder1/ without /temp/ prefix. </p>

<pre><code>using (ZipFile zip = new ZipFile())
    {
        foreach (var f in filesToInclude)
        {
            zip.AddFile(f);
        }
</code></pre>
