Hard-coded /usr/local references are fragile

For a variety of reasons, we have moved the view path from /usr/local to /opt/local in eic-shell. This may mean that hard-coded references to /usr/local will need to be changed or, even better, avoided. E.g.
https://github.com/eic/epic-analysis/blob/d72c69e07db7118d8e21b22efd85a461e7882f6f/Makefile#L29