Creating a new branch for recoding sediment compaction to use the volume of expelled fluid to calculate the compaction velocity

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

Updated vermajor to 3 (v0.3), added options for restarting with compaction output, modified code to not read/write output for certain fields when they are not used (isostasy, compaction, nest)

Updated vermajor to 3 (v0.3), tweaked allocation of density string arrays, added options for restarting with compaction output, modified code to not read/write output for certain fields when they are not used (isostasy, compaction, nest)

Added option for viscosity/strain rate strengthening/hardening, added option for sstemp calculation on restart

Added options for restarting with compaction output. Modified code to not read/write output for certain fields when they are not used (isostasy, compaction, nest)