add spec tests for sightstone and champion object

lib/sightstone/champion.rb

@@ -15,17 +15,10 @@ class Champion
   attr_accessor :active, :attackRank, :botEnabled, :botMmEnabled
   attr_accessor :defenseRank, :difficultyRank, :freeToPlay, :id, :magicRank, :name, :rankedPlayEnabled
   
-  def initialize(data)
-    @active = data['active']
-    @attackRank = data['attackRank']
-    @botEnabled = data['botEnabled']
-    @defenseRank = data['defenseRank']
-    @difficultyRank = data['difficultyRank']
-    @freeToPlay = data['freeToPlay']
-    @id = data['id']
-    @magicRank = data['magicRank']
-    @name = data['name']
-    @rankedPlayEnabled = data['rankedPlayEnabled']
+  def initialize args
+    args.each do |k,v|
+      instance_variable_set("@#{k}", v) unless v.nil?
+    end
   end
   
 end