Place dui working files in subdirectory

[ndevenish]

Problem:

1. User logs on for a tutorial
2. User types module load dui
3. User processes data
4. Oh no! The user has filled their home directory with junk!

Solution:

• Instead of putting everything in the current working directory, just put everything in e.g. a dui subdirectory.

[luisodls]

Solved a while ago, now DUI creates a dir called dials_files