Fix fortran install process + shared lib by default (much more verbose ...), review default method setup in operators, review fftw curl.

24 - test_opencl_environment (Failed), because of pep8
Examples not tested but NSDebug.py which works fine.

Fix bug in HDF5/VTK output
Fix bug in field initialization
Modif in FD and diff operators

general updates concerning NS benchmark with bluff bodies (flow past sphere, etc ...) - still some problems to solve ...

Adaptative vorticity projection according a given criterion + velocity correction (to prescribe proper mean flow and ensure the desired inlet flowrate) + some updates in adaptative time step procedure

general updates with in particular, simulation with adaptative time step, script for flow past bluff bodies, forces computation