* Query Tests:
  * Tree is empty (return none).
  * Tree contains only elements to the left.
  * Tree contains only elements to the right.
  * Tree contains only elements to the left and to the right.
  * Tree contains overlaps and elements to the left.
  * Tree contains overlaps and elements to the right.
  * Tree contains overlaps and elements to the left and to the right.


git-svn-id: file:///svn/tokudb@1769 c7de825b-a66e-492c-adef-691d508d4ae1