Converted a bunch of the ANL datasets to new constructor format. Split up GenerateWeights and BuildSplines stage in SplineRoutines so that weight sets can be re-used if the spline form needs to be changed. Added chunk processing when building splines to deal with some pretty major memory issues. Added ability to process chunks in parrallel in seperate jobs and then merge them at the end to bring spline generation back below 24 hours. 2D splines are becoming a real ballache.....