Changed a default make_watertight output in get_unmerged_curves to a debug statement.
Adjusted passing the bool debug to the measure_volume function and all of its subsequent calls to remove unwanted messages in make_watertight runs.
Changed some make_watertight warnings to debug statements.
Changed the deleted surface output to a debug statement.
Removed unecessary output about gettting entities.
Changed output about merging curves to a debug statement.
Changed verbose degenerate triangle messages to debug messages.
Corrected wording in make_watertight outut messages.