Cleaned up/improved spinup steady-state thermal calculation option; Added option to fix all surfaces in spinup phase; Added option to fix cloud during spinup phase; Added option for spinup convergence tolerance; Added identification of first time step/iteration/nonlinear iteration; Added option for using spinup phase material numbers

Added option of using previous steps strain rate to soften materials, updated only at the end of the previous step

Added option of defining a dominant material type that will define the element material properties if any volume is present within an element

Replaced ztrans functionality for material transitions below a given depth to a more general transition behavior which allows transitions in at any constant x, y or z value

Added output of yield_ratio and did minor cleanup; moved ziso stuff into bc_definition derived data type

Added Jean's subroutine for moving surface points along a normal to coincide with the zero of the LSFs

Added integer 'matnum' (material number) to osolve. Added logical 'nest' to parameters. Cleaned up a bit.