Better path handling for SEP binary files
Ignores bck files from vi and emacs
Adds a section about SEP models in the manual
updated an old comment
Corrects english errors
Merge branch 'devel' of github.com:mpbl/specfem3d into devel
Merge branch 'devel' of https://github.com/geodynamics/specfem3d into devel
Modif Parfile DSM