[Stellarium-pubdevel] Core cleaning milestone

[Matthew G. <mat...@gm...>]

I finished removing string, wstring, fstream and iostream code from all 
files in the src/core directory.

I have touched a lot of code, and I probably introduced a few subtle bugs 
along the way.  Keep an eye out for problems.

I'll tackle the modules directory now.  Hopefully there won't be quite as 
much to do now as the core cleaning pushed a lot of changes in the modules 
source files already.

Let me know if I missed anything in core/

Matthew