Update Core.cpp

[echolevel]

I needed iXML output to stdout as well as an .xml file, so I added a cout just before the file is saved. There may be a more elegant way to do it, in which case I'd be glad to hear about it!

[JeromeMartinez]

This is too direct, and specific:

• I would prefer that this is usable if an option is set
• providing it only for iXML makes the interface non consistent, should be done for all options.

IMO there is the need of some refactoring for having a common function for writing to files then an option should be used for knowing if we need to save in a file or export to cout or both.

I get it that this is a lot more code to change...

[echolevel]

Agreed, making it consistent and optional would be best - but unfortunately beyond my own expertise. Perhaps someone else will come along and take a look in the future, or I'll return to it when my C++ skills improve :)