updates interpolation tool; removes redundant asdf helper files; adds new flush_system.f90 file; renames long function names
added see_also_README_inversion_package_list_of_things_to_do_in_the_SPECFEM3D_package.txt
updated two comments
small updates for file names of source derivatives for adjoint simulations
updates file i/o units; prettifies code
synchronizes gpu loading
prepares GPU buffer for checking wavefield norms at timestamps
Switched request file write to a parallel write (one file per region).

Replaced serial request read with parallel request read.

Fixed up the reading in of the new cem model

Switched request file write to a parallel write (one file per region).

Replaced serial request read with parallel request read.

Fixed up the reading in of the new cem model
Cleaned up merged version of model_cem.f90 a bit.
Brought model_cem back up to fortran 2003 standard.
added a comment from Daniel Peter
fixed one line typo in smooth_sem utility
Switch xlf to -qstrict.

This change prevents some minor differences of results between xlf and
other compilers. There is a small decrease in performance, but generally
it can be overshadowed by other problems like slow I/O.
Increase iterations for xi and eta to 5.

This should produce consistent results when comparing ifort, gfortran
and xlf.
added a comment about -qstrict
Merge branch 'ak135-consistency' of github.com:QuLogic/specfem3d_globe into devel
"Buildbot ran code beautifier."
updated the comment about increasing the number of iterations from 4 to 5
avoids compiler warnings and adds parameter statement to LDDRK constants; needs a workaround in compute_forces_outer_core_Dev.F90 because of a gfortran OpenMP bug
improves minimum required gpu memory estimate