Add the matlabpool code to actually open the workers rather than letting MATLAB try to figure out that it should do it itself
Ignore MATLAB saved files
Add some (simple) unit tests to make sure the results of the toolbox functions are maintained between changes.

At the moment, this is only a simple check against an existing result, so it is not particularly comprehensive, but it should sound alarm bells if something has broken catastrophically.

The data against which grid2fvcom is compared is not included in the toolbox as it is too large (and this whole testing thing might be moved to a separate repository if it makes more sense that way).
Rename test file with test_ prefix
Add a better range of tests:

    - The number of nodes and elements in the returned arrays against the reference arrays.
    - The number of time steps in the returned arrays.
    - The range of values in the arrays (both nodal and element arrays).
Fix remaining array name from the serial implementation