LIU-22 Adding new -w/--work-dir option
LIU-22 Adding new -w/--work-dir option

This does exactly what one would expect. It somehow clashes a bit with
the current --cwd option, so the latter should be removed in the future
(but for the time being an error is issued if both are used).

Signed-off-by: Rodrigo Tobar <bd955c861cbec2e41c0959cf13c7f573fa307e58@icrar.org>

steve-ord/daliuge,steve-ord/daliuge,steve-ord/daliuge,steve-ord/daliuge,steve-ord/daliuge,steve-ord/daliuge,steve-ord/daliuge