Remove class5 git_config
Remove class5 songs
Remove class5 target images
Remove class5 gitignore file
Improve class5 exercises
Fix typos
Fix typo
Add class5 exercise5
Improve branching and looping guides
Fix bug
Improve readability
Improve array and method guides
Fix typo
Merge branch 'master' of https://github.com/codefellows/sea-c21-ruby
class4 assignment changes