CRA-568: Cleanup/warnings.
CRA-585: Copied functions for ModelGravityStatic and ModelGravityDynamic with GravityInversion from veralh.
CRA-585, CRA-587: Added updated gravimetric files from veralh.
CRA-585: Added data for Gravity in CommonData. Created new constructors for ModelGravityStatic and ModelGravityDynamic.
CRA-587: Set up data for TravelTime in CommonData from TravelTimeDynamic.
CRA-527, CRA-531, CRA-553, CRA-590: Fixed facies_names from well-logs, added eroded surfaces to simboxes.