Unix shell solutions with old data files

[Damien Irving]

There are a bunch of solutions for exercises in "Building Tools with the Unix Shell" and "Going Further with the Unix Shell" that haven't been updated from when they used Software Carpentry data files (e.g. pentane.pdb, cubane.pdb, etc). It looks like the exercises in the chapters have been updated to use our data files (i.e. dracula.txt, etc) but not the solutions.