Diagnostics, exception and error mechanism

[hnkb]

• Use << operator for error handler

ErrHandler << comCall();
comCall() >> toStdException;

• Provide clangformat rules for clean alignment of ThrowIfFailed operator
• Get error message as wide char and convert to utf8
• Report filename in exception message for file-related failures
• Use typeid for window classname
• Evaluate using STL native file system and codecvt and whether my own utilities are needed anymore or not
• Different settings root key (in the Registry) for different executables possible (add a scene constructor that takes a crib/XXX as parameter and uses that sub-key for the Registry operations)

More

• Possibility of an automated or manual log file? Is it needed?
• System information?