Bordercases

[bieron]

Hello!

While participating in #hacktoberfest, I remembered your awesome game. Instead of fixing my old pull request and conflicts, I decided to make a fresh one from the master branch.

Anyway, these are simple border cases checks

• if there is no commit in current branch
• if you are not in a git repository
• if you beat all the commits in the repository - and the message is more optimistic now! yay :)

Also, commits are shuffled only once