Updated test.js to include 'chai' asserts, and 'chai' expect behaviors.
Renamed some fixtures and updated fixtures.js

to_array.csv -> array.csv
from_array.json -> array.json
to_arrays.csv -> arrays.csv
from_arrays.json -> arrays.json
Added tests

toArray - parse a multi-cell array
toArrays - parse a multi-entry array
fromArray (disabled) - format a multi-cell array