Adds rspec structure
Adds spec for Deck
Adds Deck#uniq, deletes wrong files
Adds Comparable to Card class

Card's <=> method compares its value, not its suit. The Card#is_same?
method takes suit into account as well, and is what Hand and Deck
call to determine if a card is in its hand.
Adds specs for Hand class
Begins adding Hand comparisons
Adds detection of hand values
Finishes <=> for Hand
Fills out specs for comparisons