more robust install/uninstall;
clarified extension_name (again): --locate-extension wants to see a lowercase name;
#!/usr/bin/env bash
#
# DESCRIPTION: build history versions from another repository clone
unset CDPATH
THIS="$(cd "$(dirname "$0")"; pwd)"
"$THIS/../bin/isabelle" scala_build -q || exit $?
"$THIS/../bin/isabelle_java" isabelle.Build_History "$@"