[fortran, committed] IEEE modules added to gfortran and libgfortran

[FX]

> Can you update https://gcc.gnu.org/wiki/GFortran/News -> 4.10?

Done, and also https://gcc.gnu.org/wiki/Fortran2003. Though I think, now that we really are nearer to F2003 support, that this page is not really useful (and probably not entirely up to date) anymore. Maybe we could move the useful part (“Unimplemented”) to the bottom of Fortran2003Status (https://gcc.gnu.org/wiki/Fortran2003Status), thus gathering all this information in one nice page?

What do you think? I’m ready to do the editing if people support the idea.

FX