Feature: Add machinery for verifying file and directory paths #183
Description
Background and motivation
See discussion in PR #178. Currently SaltProc has some gaps in its program flow where paths are passed to class constructors, but have not been checked as valid.
Description of idea
We need to add machinery that allows us to check these paths. Something like check_value.py in OpenMC.
Implementation details
None, see the above link for inspiration.
Potential snags
None.