Check hidden options (though such options should be optional)
Fix documentation
Fix the constructor of MapIterator (take function object by value)
Add the possibility to add a description for the values of the MapParser. Not used in CmdLine::help() yet.
Fix IsCallable
Display the description for the values of a MapParser in the help() method.
Let the standard library decide when to throw exceptions...
Remove unused code
Move PrettyPrint.h into the test directory