Added a flat-tree option to the GedcomStructureTextPrinter to create
output without indentation (as required in the gedcom standard)
Revert "Added a flat-tree option to the GedcomStructureTextPrinter to create output without indentation (as required in the gedcom standard)"

This reverts commit e4206103ccf0ee3adcbf64941b8dd3cdfc913c52.
Added a flat-tree option to the GedcomStructureTextPrinter to create
output without indentation (as required in the gedcom standard)