Added override on plot axes.

Added exception for when a path isn't found.
Fixes to pathnames for input and output

Fixed pathnames coming in with regex reserved characters - issue with
DSSVue's getCatalogedPathnames function.  Result is all special
characters in a short list are replaced with "*", which works as a
general wildcard.

Fixed output pathnames on scatter to combine parameter term if the same
from both source pathnames.