Adds class for AVL version of IBS-Tree
Change Add(IInterval<T>) to return boolean stating if the interval was added
Add benchmarker for LCList's sorted enumerator
Changes standard deviation to percentage instead of ns to better be able to compare numbers with different sizes
Adds proper public method LCList's FindOverlapsSorted which calls the recursive findOverlapsSortedRecursive. Iterative version to come.
Adds small test fixture for LCList FindOverlapsSorted
Adds iterative version of findOverlapsSorted