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/README.md

@@ -257,7 +257,7 @@ Only those files that exist will be put into the compressed tarball.
 The compressed tarball formed (by default under the `/var/tmp` directory)
 is of the following form:
 
-> YYYY_dir.YYYYMMDD.hhmmss.tar.bz2
+> YYYY_dir.mods.YYYYMMDD.hhmmss.tar.bz2
 
 Here "_YYYYMMDD.hhmmss_" is a date and timestamp from when the tool was executed.
 
@@ -266,13 +266,13 @@ submission directory (that could be modified or removed by this tool)
 to be restored as follows:
 
 ``` <!---sh-->
-    tar -jxvf /var/tmp/YYYY_dir.YYYYMMDD.hhmmss.tar.bz2 YYYY/dir
+    tar -jxvf /var/tmp/YYYY_dir.mods.YYYYMMDD.hhmmss.tar.bz2 YYYY/dir
 ```
 
 One may also restore modified `author/author_handle.json` files using:
 
 ``` <!---sh-->
-    tar -jxvf /var/tmp/YYYY_dir.YYYYMMDD.hhmmss.tar.bz2 author
+    tar -jxvf /var/tmp/YYYY_dir.mods.YYYYMMDD.hhmmss.tar.bz2 author
 ```
 This tool will form `YYYY/dir/README.md` if needed, from `YYYY/dir/remarks.md`,
 `template/entry/README.md.head`, and `template/entry/README.md.tail`.