- Always generate installed python_wrapper to ensure it's up to date
- Install python_wrapper in $(pkglibexecdir) instead of $(pkgdatadir)
- Use sed to filter PYTHONPATH before prepending, as per user env. scripts
- Check that input Python source file does not already have a #! line
- Remove @PYTHON...@ replacements from old LALApps Python scripts
Original: f8e5691b4810d4b9a6777b71cdd356926414dcb3