Fixed typo in msmbuilder.testing (spase -> sparse). Added check for the shape of the matrices in msmbuilder.testing.assert_sparse_matrix_equal. This is the reason the BuildMSM test is failing. msmbuilder/reference/tProb.mtx is (74, 74) whereas tCounts is (100, 100). I don't know where the real tProb.mtx went...