Add Diego Stiehl to Contributors List and Fix Javier S. Castillo's entry
Add Diego Stiehl to Contributors List and Fix Javier S. Castillo's entry

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