modifications to scanner.py

 /home/taylor/git/cs554-project1/scanner.py autocommit from emacs: Sun Oct 12 09:47:43 2014
added a consume function into the regex class to help with the scanner generator

 /home/taylor/git/cs554-project1/regex.py autocommit from emacs: Sun Oct 12 13:31:48 2014
finished scan method in the lexical description

 /home/taylor/git/cs554-project1/scanner.py autocommit from emacs: Sun Oct 12 15:26:41 2014