changed repo to repository in a few places. Also quoted "<url>" in the explaination on cloning the repository.
changed repo to repository in a few places. Also quoted "<url>" in the explaination on cloning the repository.

suttonwilliamd/first-contributions,suttonwilliamd/first-contributions,lauratavares/first-contributions,FearTheFrail/first-contributions,RickHaan/first-contributions,lauratavares/first-contributions,Shhzdmrz/first-contributions,RickHaan/first-contributions,dichaves/first-contributions,Shhzdmrz/first-contributions,FearTheFrail/first-contributions,Abhishekchakru/first-contributions,dichaves/first-contributions,Plmkn/first-contributions,Abhishekchakru/first-contributions,Plmkn/first-contributions