Passes 2 out of three of the colbeck tests

build/source/dshare/globalData.f90

build/source/engine/computFlux.f90

build/source/engine/coupled_em.f90

build/source/engine/opSplittin.f90

build/source/engine/snowLiqFlx.f90

build/source/engine/snowLiqFlx_old.f90

build/source/engine/var_derive.f90

utils/laugh_tests/celia1990/verification_data/runinfo.txt

utils/laugh_tests/colbeck1976/actors_out.txt

utils/laugh_tests/colbeck1976/run_test_summa.sh

utils/laugh_tests/colbeck1976/summa_out.txt

...k1976/verification_data/colbeck1976-exp1_G1-1_timestep.nc

...k1976/verification_data/colbeck1976-exp2_G1-1_timestep.nc

...k1976/verification_data/colbeck1976-exp3_G1-1_timestep.nc

utils/laugh_tests/colbeck1976/verification_data/runinfo.txt

utils/laugh_tests/colbeck1976/verify_colbeck.py