Make find-bottom-left-value less terse
Make find-bottom-left-value less terse

Appending to a list that is being looped over and
having a loop variable being used after loop context is done
just rubs me the wrong way.
Made this look look more like level traversal with the left node
added last.

kamyu104/LeetCode,tudennis/LeetCode---kamyu104-11-24-2015,tudennis/LeetCode---kamyu104-11-24-2015,kamyu104/LeetCode,tudennis/LeetCode---kamyu104-11-24-2015,kamyu104/LeetCode,kamyu104/LeetCode,tudennis/LeetCode---kamyu104-11-24-2015,tudennis/LeetCode---kamyu104-11-24-2015,kamyu104/LeetCode