Merge pull request #5 from agerlic/master

rename pick player into pick_player_card
challenges outline for 1st day
challenges outline for 1st day
challenges outline for 1st day
challenges outline for 1st day
challenges outline for 1st day
first draft on teachers guidelines for 1st day
first draft on teachers guidelines for 1st day
second version for teachers guidelines
second version for teachers guidelines
second version for teachers guidelines
slight improvements first guidelines
slight improvements first guidelines
slight improvements first guidelines
small changes
guidelines day 2
first shot
Update README.md
more details on arguments with default values
Allow students to use return