added scanning functionality and fixed consuming in regex.py

 /home/taylor/git/cs554-project1/scanner.py autocommit from emacs: Sun Oct 12 22:01:19 2014
merged conflics

 /home/taylor/git/cs554-project1/description_reader.py autocommit from emacs: Sun Oct 12 22:03:05 2014
 /home/taylor/git/cs554-project1/regex.py autocommit from emacs: Sun Oct 12 22:04:09 2014