Add full grid path to t2kdm-ls output

[wilkinson-nu]

It would be nice to have an option to include the full grid path of files. Then I can use the output of t2kdm-ls to make a list of individual files I can get with t2kdm-get (e.g., in a cluster job)
E.g., currently:
$ t2kdm-ls /test/t2kdm
test1.txt
test2.txt
test3.txt

But I want:
$ t2kdm-ls /test/t2kdm
/test/t2kdm/test1.txt
/test/t2kdm/test2.txt
/test/t2kdm/test3.txt