initial check-in of comparator for doing regression tests
updated for compatibility with changes to StringT
added potential function from Triantafyllidis and Bardenhagen
added ClearRows function
added FindString for search text files
removed deprecated DefaultName function
added function to extract double and integer values from a string
initial check-in of potential function from Triantafyllidis and Bardenhagen
initial check-in
toward the new element/material interface
