adding new test

tests/Makefile.am

tests/kalman_filter_smoother/algo1.mod

tests/kalman_filter_smoother/algo2.mod

tests/kalman_filter_smoother/algo3.mod

tests/kalman_filter_smoother/algo4.mod

tests/kalman_filter_smoother/algo4a.mod

tests/kalman_filter_smoother/algo4b.mod

tests/kalman_filter_smoother/algoH1.mod

tests/kalman_filter_smoother/algoH2.mod

tests/kalman_filter_smoother/algoH3.mod

tests/kalman_filter_smoother/fs2000.mod

tests/kalman_filter_smoother/fs2000_1.mod

tests/kalman_filter_smoother/fs2000_2.mod

tests/kalman_filter_smoother/fs2000a.mod

tests/kalman_filter_smoother/fsdat_simul.m