#6: add lca_algorithm() method to class_definitions.py
#6: add two input values for lca (input.txt)
#6: correctly indent lca_algorithm() method (class_definitions.py)
#6: properly call imported lca_algorithm() (least_common_ancestor.py)
#6: add doc-comment for lca_algorithm() (class_defintions.py)
#6: print returned lca value (least_common_ancestor.py)
#6: fix indentation for return value for lca_algorithm()
#6: remove unnecessary print() statement (class_definitions.py)
#6: change lca input values (input.txt)
#6: print lca message, and value (least_common_ancestor.py)
Merge pull request #8 from jeff1evesque/lca-algorithm

#6: lca algorithm