write addfile logs to /var/log/ddr with rest of logs

- Keep all the logs in the same place.
- logrotate them.
restored filesize capture as part of add_file
added file role link to breadcrumbs

It's bothered me that I could not go back up one level to the
entity masters/mezzanines from the file detail page.
moved select-all and dismiss btns to top of tasks list page

This way the user doesn't have to scroll to the bottom to clear
the list (OTOH maybe that's a good thing...).