Fix in the HierarchyTree algorithm
tree943d9c2ce7e45ffde61f4e6a009d0bbd4776a6db
drwxr-xr-x - build
drwxr-xr-x - doc
-rw-r--r-- 26434 licence.txt
-rw-r--r-- 37 qanava.pro
-rw-r--r-- 4667 readme.txt
drwxr-xr-x - src
drwxr-xr-x - tests