HOTFIX: definition of ramp in irregular case + README completed

Signed-off-by: Guillaume Ducrozet <guillaume.ducrozet@ec-nantes.fr>
Post-processing of wave-fields
    - reading of modal description
    - computation of volumic information
    - velocities and pressure cards

All necessary routines for SWENSE coupling should be available

Signed-off-by: Guillaume Ducrozet <guillaume.ducrozet@ec-nantes.fr>
Input file slightly modified
    - itypprobes removed: we always use probe location
    - Tstop belongs to time description

Signed-off-by: Guillaume Ducrozet <guillaume.ducrozet@ec-nantes.fr>
Modal description of volumic data is adjusted
    - Everything is non-dimensional in header
    - Corresponding changes in read-files (PostProcessing)

Signed-off-by: Guillaume Ducrozet <guillaume.ducrozet@ec-nantes.fr>
HOTFIX: missing input file

Signed-off-by: Guillaume Ducrozet <guillaume.ducrozet@ec-nantes.fr>
ifort compatibility of makefile
    - order of appearance of linking routines is important...

Signed-off-by: Guillaume Ducrozet <guillaume.ducrozet@ec-nantes.fr>