Remove support for automatic help messages
Support std::reference_wrapper for parsers
Move applyRec into OptionBase
Rename parser parameters
Remove support for maximum number of splits
Remove isOptional
Remove explicit conversion operator
Add a trailing underscore to private members
Always return all options (do not skip hidden options)
Fix HasInsert
Make some member functions public
Add flags to control parsing
Add support for response files
Add methods to print help messages