data: add two new files

- new meteo
- new seed date

Update the CMakeLists.txt file.
src: fix several bugs

- The std::stod, std::stoi and std::stof use the global locale. So, to
  ensure we use the classic locale we rewrite these function into the
  safihr namespace.

- Add a news output `day_lev` in GenericCropModel to debug the raising
  date.