Added output of current subversion repository version at runtime, with necessary scripts and module files

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

Added nest type for using nested model parameters. Reorganized things to have debug level 1 only write to screen; 2 to files.

Reverted to using 'include mpif.h' as the use of mpi.mod requires the MPI module be compiled with the same compiler as the DOUAR source, which is not true on geodyncomp

Modified to use an initial e2d value for the first plasticity calculation and output the dilatation rate