Started to write test functions for Hierarchy class.
added the Hierarchy folder to the Git.
I added some more hierarchy test functions.
m
Added some test functions. I found 2 unfinished functions SetRoot() and SetParent(). I make the test functions for these elements when they are ready.
I finished IsSelfOrChild() test function. While i did the testing I notised that we have old function Flatten() in hierarchy that needs to be removed.Atm the function returns empty vector.
Hierarchy test functions are now done.
Merge pull request #4 from IndiumGames/hierarchy-testing

Hierarchy testing