Add class 6 exercises
Fix class 6 exerise 3
Fix class 6 exerise 2
Improve assignments for class 6
Add executable bit to all class 6 exercises
Tweak class 6 exercise 4
Merge branch 'master' of https://github.com/codefellows/sea-c17-ruby
Tweak to class 6 exercises
Tweak to class 6 exercise 5
Committing changes to merge upstream.
Merge branch 'master' of https://github.com/codefellows/sea-c17-ruby
Class 6 assignments completed.
Merge branch 'master' of https://github.com/bstamp/sea-c17-ruby

Conflicts:
	class5/1_build_a_shuffled_playlist.rb
	class5/3_rename_your_photos.rb