checkpoint on bin/cvt-submission.sh

This is a checkpoint on `bin/cvt-submission.sh` development.

The `bin/cvt-submission.sh` tool now forms a compressed tarball
to contain submission files that will be modified or removed
by the tool.  The compressed tarball formed will be of the form
`/var/tmp/YYYY_dir.save.YYYYMMDD.hhmmss.tar.bz2`.

Added `-u` facility to  `bin/jval-wrapper.sh` to strip unnecessary
leading path elements.

Changed `bin/jval-wrapper.sh` VERSION from "1.0.2 2024-08-08"
to "1.0.3 2024-08-11".

Changed `bin/cvt-submission.sh` VERSION from "1.0.3 2024-08-09"
to "1.0.4 2024-08-11".

Performed `make quick_www` to test the above under macOS.

bin/index.html

@@ -554,15 +554,15 @@ under the <code>/var/tmp</code> directory, may contain such as:</p>
 The compressed tarball formed (by default under the <code>/var/tmp</code> directory)
 is of the following form:</p>
 <blockquote>
-<p>YYYY_dir.YYYYMMDD.hhmmss.tar.bz2</p>
+<p>YYYY_dir.mods.YYYYMMDD.hhmmss.tar.bz2</p>
 </blockquote>
 <p>Here “<em>YYYYMMDD.hhmmss</em>” is a date and timestamp from when the tool was executed.</p>
 <p>The purpose of this compressed tarball is to allow the files in the
 submission directory (that could be modified or removed by this tool)
 to be restored as follows:</p>
-<pre><code>    tar -jxvf /var/tmp/YYYY_dir.YYYYMMDD.hhmmss.tar.bz2 YYYY/dir</code></pre>
+<pre><code>    tar -jxvf /var/tmp/YYYY_dir.mods.YYYYMMDD.hhmmss.tar.bz2 YYYY/dir</code></pre>
 <p>One may also restore modified <code>author/author_handle.json</code> files using:</p>
-<pre><code>    tar -jxvf /var/tmp/YYYY_dir.YYYYMMDD.hhmmss.tar.bz2 author</code></pre>
+<pre><code>    tar -jxvf /var/tmp/YYYY_dir.mods.YYYYMMDD.hhmmss.tar.bz2 author</code></pre>
 <p>This tool will form <code>YYYY/dir/README.md</code> if needed, from <code>YYYY/dir/remarks.md</code>,
 <code>template/entry/README.md.head</code>, and <code>template/entry/README.md.tail</code>.</p>
 <p><strong>NOTE</strong>: This interactive tool (unless <code>-i input_data</code> is used) does