Added specs
Merge branch 'master' of github.com:lewagon/promo-2-challenges

Conflicts:
	03-AR-Database/03-Interacting-with-code/lib/queries.rb
	03-AR-Database/03-Interacting-with-code/spec/challenge_spec.rb
solution
Merge branch 'master' of github.com:lewagon/promo-2-challenges

Conflicts:
	03-AR-Database/03-Interacting-with-code/lib/queries.rb
First attempt, solved it