fixes, documenttation and tests for game api

lib/sightstone/modules/game_module.rb

@@ -2,12 +2,17 @@ require 'sightstone/modules/sightstone_base_module'
 require 'sightstone/summoner'
 require 'sightstone/match_history'
 
+# module to access the game api
 class GameModule < SightstoneBaseModule
   
   def initialize(sightstone)
     @sightstone = sightstone
   end
   
+  # returns the match history of a summoner
+  # @param [Summoner, Fixnum] summoner summoner object or id of a summoner
+  # @param optional [Hash] optional arguments: :region => replaces default region
+  # @return [MatchHistory] match history of the summoner
   def recent(summoner, optional={})
     region = optional[:region] || @sightstone.region
    id = if summoner.is_a? Summoner