fixed wrong require call in some classes

lib/sightstone/match_history.rb

@@ -1,4 +1,3 @@
-require 'sightstone/stat'
 
 # match history of a summoner
 # @attr [Fixnum] summonerId ID of the summoner
@@ -88,4 +87,4 @@ class Stat
       data['count']
     end
   end
-end
+end

lib/sightstone/player_stats_summary.rb

@@ -1,4 +1,3 @@
-require 'sightstone/stat'
 
 # summary of player statistic
 # @attr [Fixnum] summonerId ID of the summoner

lib/sightstone/ranked_stats.rb

@@ -1,4 +1,3 @@
-require 'sightstone/stat'
 # Ranked stats of a summoner
 # @attr [Fixnum] modifyDate date of last modification
 # @attr [Fixnum] summonerId id of the summoner

sightstone.gemspec

@@ -1,6 +1,6 @@
 Gem::Specification.new do |s|
   s.name = 'sightstone'
-  s.version = '0.9.0'
+  s.version = '0.9.1'
   s.date  = '2014-01-01'
   s.summary = 'Ruby wrapper for riots league of legends api'
   s.description = s.summary