Folders added with respective README files
Add feature to play sound after X minutes
Credit Card Validator done
Update README.md
Distance between cities done
Update README.md
Rearrange addendum for readability.
Top of github again!
Update README.md
Update README.md
Organized screenshots of GitHub Explore page
Update README.md
Making problems more practical.

Will change some problems around, and remove some and add some, to make this repo more practical and achievable.
Update README-scratch.md
Update README.md
Create CONTRIBUTING.md

On popular demand!
Added ways of contributing!
Now contains only the problems, no blurb!
Describe contributions further!
Added instructions on including sources. Improved formatting.