Improve assignments for class 6
Add executable bit to all class 6 exercises
Tweak class 6 exercise 4
updated
Merge branch 'master' of https://github.com/codefellows/sea-c17-ruby
Tweak to class 6 exercises
Merge branch 'master' of https://github.com/codefellows/sea-c17-ruby
Tweak to class 6 exercise 5
Merge branch 'master' of https://github.com/codefellows/sea-c17-ruby
updated