deleting declared but unused variables, removing dummy arguments,
changing variables to double precision.
Not touching: uninitialized and more complicated warnings.

added variable calc_comp_velo, which is used to determined when compaction velocity should (or should not) be calculated

Fixed a few compaction problems: Deallocating certain osolve fields after compaction; Storing densityp=density in initialize_compaction; Several small bugs related to calculating the compaction velocity

Fixed problem with integer values being typed as doubles, set initialization value for cur_lsf, added absolute values for density comparisons, pruned old comments

DOES NOT COMPILE. This version with Janice's adjustment to calculate_density_profiles, which will now differentiate between initializing the strings and subsequently applying compaction. Note that currently the LSFs must be used for all calls to compaction; not yet compatible withs surface removal.

DOES NOT COMPILE!!! This is the first attempt at a complete compaction implementation. Needs debugging/testing!