* xcroco : 
  - new operator to interpolate grid point, fix bugs
  - fix bug backend AGG in batch
  - add vorticity on sigma levels, news for movie
* prepro : 
  - update method to install python env and compile fortran tools
  - delete unused fortran routines
  - correction for wet-dry
  - correction for FES
  - correction for mask when passing the dateline
  - manage read input with s_rho and Cs_rho variables
  - add download scripts
  - add several tutos and docs
  - some cosmetics