added the laugh tests to the dir

build/makefile

utils/laugh_tests/celia1990/output/runinfo.txt

...celia1990/output/summa-actors_celia1990GRU1-1_timestep.nc

utils/laugh_tests/celia1990/plot_lt_celia1990.ipynb

utils/laugh_tests/celia1990/run_test_summa.sh

..._tests/celia1990/settings/summa_fileManager_celia1990.txt

...celia1990/settings/summa_fileManager_verify_celia1990.txt

utils/laugh_tests/celia1990/verification_data/runinfo.txt

...ia1990/verification_data/summa_celia1990_G1-1_timestep.nc

utils/laugh_tests/celia1990/verify_celia.py

utils/laugh_tests/dir_setup.sh