Bring back backuptask

This is required for various small reasons:

* dir iteration with a way to pass messagein back to the upload() easily
* can be killed independently of box code
* allows us to run sync (blocking) commands in the upload logic

src/test/checkInstall

@@ -17,7 +17,7 @@ scripts=("${SOURCE_DIR}/src/scripts/rmappdir.sh" \
          "${SOURCE_DIR}/src/scripts/collectlogs.sh" \
          "${SOURCE_DIR}/src/scripts/configurecollectd.sh" \
          "${SOURCE_DIR}/src/scripts/authorized_keys.sh" \
-         "${SOURCE_DIR}/src/scripts/tar.js" \
+         "${SOURCE_DIR}/src/backuptask.js" \
          "${SOURCE_DIR}/src/scripts/configurelogrotate.sh")
 
 for script in "${scripts[@]}"; do