Changes

Summary

1. Removing elementalness from sat_vapor_press_liq and making interal procedures subroutines rather than functions to prevent unneccesary data copies. Doing the same for thlm2T_in_K since it is often used in conjunction with sat_vapor_press_liq. Bit-for-bit confirmed with O0 using all single column cases with or without l_diag_Lscale_from_tau, and with cam_coarse_res. larson-group/clubb#972 (details)
2. Adding comments. (details)

Removing elementalness from sat_vapor_press_liq and making interal procedures subroutines rather than functions to prevent unneccesary data copies. Doing the same for thlm2T_in_K since it is often used in conjunction with sat_vapor_press_liq. Bit-for-bit confirmed with O0 using all single column cases with or without l_diag_Lscale_from_tau, and with cam_coarse_res. larson-group/clubb#972

Adding comments.