Use pytest in all testfiles
Changed tests to include pytest parameters. Changed tests are
test_bsplines_kernels.py
test_filler_kernel.py
test_mappings.py
test_mat_vec_filler.py
test_spline_evaluation.py
This fixes clapp/hylife#38
Changed tests to include pytest parameters. Changed tests are
test_bsplines_kernels.py
test_filler_kernel.py
test_mappings.py
test_mat_vec_filler.py
test_spline_evaluation.py
This fixes clapp/hylife#38