Write a Python function that returns the scoring and traceback 
matrix of the Needleman-Wunsch algorithm. Your function definition
would be

def computeVandT(seq1, seq2, V, T, m, mm, g):

where seq1 and seq2 are DNA sequences, V and T are matrices with
len(seq1)+1 rows and len(seq2)+1 columns, and m, mm, and g are
match, mismatch, and gap costs. 

Submit a hardcopy solution in class on Feb 26th.