Load the dictionary of exceptions as a CSV instead

[harrisj]

I think a large JSON file is hard to maintain and edit and the structure of this file is simple enough that a CSV will do. This is some code to load the dictionary of exceptions as a CSV. Next I would like to modify it so user can amend with their own list of additional exceptions.

[mholtzscher]

My only concern with changing this is performance. I think the csv should be fine but I'd like to run a few perf tests to double check it

[harrisj]

If performance is a concern, I would like to ask if the JSON can be split over multiple lines to make it easier to review additions to the syllabification exceptions?