improve bin/add-dir.sh, checkpoint bin/cvt-submission.sh

We improve `bin/add-dir.sh` by calling `make genpath` so
that the `.allyear` will be up to date.

Changed `bin/add-dir.sh` VERSION from "1.1.1 2024-07-28"
to "1.2 2024-08-09".

Checkpoint `bin/cvt-submission.sh`: a work in progress.

Added more files to `template/entry` in support of the
checkpoint of the `bin/cvt-submission.sh` tool.

Changed `bin/cvt-submission.sh` VERSION from "1.0.2 2024-08-05"
to "1.0.3 2024-08-09".

Performed `make www` to accomplish the above and to test under macOS.

template/entry/README.md.head

@@ -0,0 +1,40 @@
+## To build:
+
+``` <!---sh-->
+    make all
+```
+
+
+## To use:
+
+``` <!---sh-->
+    ./prog
+```
+
+
+## Alternate code:
+
+XXX
+
+
+### Alternate build:
+
+``` <!---sh-->
+    make alt
+```
+
+
+### Alternate use:
+
+``` <!---sh-->
+    ./prog.alt
+```
+
+
+## Judges' remarks:
+
+XXX
+
+
+## Author's remarks:
+