/*
  + Write an application that parses strings formatted like the below into a tree structure.
  + Format:
   1. Top level nodes are not indented.  There may be more than one top level node.
   2. If the current line is indented one tab deeper than the previous line, it is a child of the previous node.
   3. The indentation level of a line may never be more than 1 tab deeper than the previous line
*/

$tree = <<<QQ
Gardening Tools
	Pruners & Loppers
		Loppers
		Pruners
	Shovels & Cultivators
		Cultivators & Tillers
		Manual Weeders
		Shovels
		Trowels & Spades
			Size 1
			Size 2
	More tools
	Even more tools
Other Things
More things
Gardening & Horticulture Books
	Flower Books
		Annuals
		Perennials
QQ;