Ignore test data for now

Will come up with a solution for distributing data files for the
tests if and when demand arises.
Simple function for reading in .mpt text files

This will be helpful for checking the data read in by the .mpr
file reader
Added a class to read in .mpt files as numpy record arrays

Realised that comparing numpy arrays read in from the binary .mpr
files to a csv.DictReader would be more work than just writing a
new function to read in a record array.