update TaylorGreen example, replace dtAdvecCrit method_key by dtCrit, add default filename in dt_adapt operator

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

Add patch to convert Parmes into SinglePrecision (to use: patch -p0 < ParmesToSinglePrecision.patch)

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

Hybrid computing fix (now ok). Sharing MPI communicator between python and fortran (convert python to fortran). Fix Scales and FFT MPI precision.

Add baroclinic operator and associated example for RTI benchmark (which is still not working properly) + some documentation + several addings/improvements  

Code improvements:
  - Standardize MPI communicator use (not always COMM_WORKD);
  - Moving operator requirements to continuous level;
  - Add task parallelism paradigm;
  - GPU: Multi-Scale advection reorganisation on GPU (reuse of remeshing formula);
  - GPU: Reuse buffer across different discretization of the same field.