Added bash solution.
Created week 2 lisp exercises.
Merge branch 'bash-solution'
Showed solutions to in class exercises.
Added one exercise for week 3.
New problems for 4th lecture.
Exercises for week 6.
Racket work
Merge branch 'master' of github.com:Duke-PL-Course/Assignments

Conflicts:
	bash/log_parse.sh
	racket/basics.rkt
Merge branch 'master' of github.com:Duke-PL-Course/Assignments
New exercises for Haskell week 2.
Exercises for Week 9.
First Ruby assignment.
Added assignment.
Wrote test cases for Haskell exercises.
Merge branch 'master' of github.com:Duke-PL-Course/Assignments
all my work