dataBank.__init() provided with an optional arg to point to a non-default *.par file

I'm proposing providing an optional init.par file path argument to dataBank.__init__() to allow different projects to use different data files.  

This will allow the user who is programmaticly interacting with OSCAAR to directly build dataBank from their own *.par file.

This also allows for easier and more efficient creation of unit tests of the dataBank functionality.