Update selenium-webdriver

Gemfile.lock

@@ -132,8 +132,10 @@ GEM
       activesupport (~> 3.1)
       polyamorous (~> 0.5.0)
     mime-types (1.19)
+    mini_portile2 (2.0.0)
     multi_json (1.7.7)
-    nokogiri (1.5.6)
+    nokogiri (1.6.7)
+      mini_portile2 (~> 2.0.0.rc2)
     orm_adapter (0.4.0)
     poltergeist (1.0.2)
       capybara (~> 1.1)
@@ -186,16 +188,16 @@ GEM
       rspec-core (~> 2.12.0)
       rspec-expectations (~> 2.12.0)
       rspec-mocks (~> 2.12.0)
-    rubyzip (0.9.9)
+    rubyzip (1.1.7)
     sass (3.2.4)
     sass-rails (3.2.5)
       railties (~> 3.2.0)
       sass (>= 3.1.10)
       tilt (~> 1.3)
-    selenium-webdriver (2.33.0)
+    selenium-webdriver (2.39.0)
       childprocess (>= 0.2.5)
       multi_json (~> 1.0)
-      rubyzip
+      rubyzip (~> 1.0)
       websocket (~> 1.0.4)
     sinon-chai-rails (1.0.2)
       railties (>= 3.1)