[glob2-devel] Refactoring

[Sébastien]

Hi,
As a first step in the migration to string, I suppressed use of xxxprintf 
format functions and replaced it by boost::format. Why ? Because xxxprintf 
use ellipsis and as a result, we can't pass string to this function, we have 
to call c_str() for every string. With boost::format we can use strings 
directly, wich is far more practical... It impact directly the 
GameGUI::addMessage method, it doesn't use the ellipsis anymore...
The next step is to use only strings in StringTable and in Widgets...
I also cleaned some unused functions in Utilities and SupportFunctions 
(concat, dencat, newstrdup...) but I guess I missed some...