switch aws client libraries

Gemfile.lock

@@ -37,10 +37,10 @@ GEM
     addressable (2.3.6)
     arel (5.0.1.20140414130214)
     awesome_print (1.2.0)
-    aws-s3 (0.6.3)
-      builder
-      mime-types
-      xml-simple
+    aws-sdk (1.28.1)
+      json (~> 1.4)
+      nokogiri (>= 1.4.4)
+      uuidtools (~> 2.1)
     bcrypt (3.1.10)
     bcrypt (3.1.10-x64-mingw32)
     bcrypt-ruby (3.1.5)
@@ -290,6 +290,7 @@ GEM
       kgio (~> 2.6)
       rack
       raindrops (~> 0.7)
+    uuidtools (2.1.4)
     vcr (2.9.0)
     webmock (1.17.4)
       addressable (>= 2.2.7)
@@ -298,7 +299,6 @@ GEM
     whenever (0.9.2)
       activesupport (>= 2.3.4)
       chronic (>= 0.6.3)
-    xml-simple (1.1.5)
 
 PLATFORMS
   ruby
@@ -306,7 +306,7 @@ PLATFORMS
 
 DEPENDENCIES
   awesome_print
-  aws-s3
+  aws-sdk
   bcrypt-ruby
   byebug
   capistrano