Write a Python script that computes the local alignment score of a query with
each sequence given in FASTA format in database.txt. The query is 
stored in FASTA format in a file called query.txt and the database
sequences are also in FASTA format. Use match cost of +5, mismatch
of -4, and gap cost of -20.

Use the query.txt and database.txt files posted on the course website
to test your programs. The order of scores given by your programs should
be similar to the one give by BLAST. The BLAST output is also posted on the
course website.

Submit hardcopies of your main_database_search.py and your alignment_functions.py
files in class on Mar 7th, 2012.