fixed unit tests (bandaid fix) added unit test stubs for functions and classes that mike made
refactored SmoothingSplines class to get in shape for testing
continuted fixing SmoothedSpline, added tests
fixed logging bug, added basic test for fitting the loss function
got all but the transcriptome filter unit tests working, those fail due to the spline fitting being more relaxed than before
fixed fitpack warning appearing randomly, now is logged
merged visualization code