- Some fixes
- All the code of the VerticalGenericTextTreePrinter is now in the
VerticalTextTreePrinter since the VerticalTextTreePrinter already served
as a base for all the other printers
- New printer style printeFirstChildOnRight added. This prints the first
child to the right of its parent. The limitation here is that it only
prints the very first printer line
Fixed alignment of additional lines
printFirstChildOnRight for HTMLTreePrinter and fix for TextTreePrinter
- Added the possibility to have a single dummy node for nodes which have
no children (not used in any of the vertical printers though). This
might be helpful when creating horizontal trees so that nodes without
children have enough space
- TextTreePrinterLines (used in vertical text printers) now extends
TextTreePrinterNodeData (a more generic node data class)