Day Stout Warren (DSW) is a method to balancing binary tree. The concept is " Tree to Vine, Vine To Tree ", first it's convert the unbalanced tree to a in-order list, then convert the list to balanced binary tree.

Project refference http://courses.cs.vt.edu/cs2604/spring05/mcpherson/note/BalancingTrees.pdf

The rightVineToTree() function is implemented based on the notes, which at page 7, the functions name call createPerfectTree()