added my solution to the problem and a sample usage session

Hi @francois!

Here is a sample usage session for my program : 

simon@simon-desktop:~/pre-interview-test$ ruby imdb.rb "star wars"
Title: Star Wars: Episode IV - A New Hope
Year: 1977
simon@simon-desktop:~/pre-interview-test$ ruby imdb.rb avengers
Title: The Avengers
Year: 2012
simon@simon-desktop:~/pre-interview-test$ ruby imdb.rb watchmen
Title: Watchmen
Year: 2009
simon@simon-desktop:~/pre-interview-test$ ruby imdb.rb "the house of the devil"
Title: The House of the Devil
Year: 2009
simon@simon-desktop:~/pre-interview-test$ ruby imdb.rb batman
Title: Batman
Year: 1989