Bump sprockets from 2.2.2 to 2.2.3

Gemfile.lock

@@ -128,7 +128,7 @@ GEM
       activesupport (>= 3.1, < 4.1)
       haml (~> 3.1)
       railties (>= 3.1, < 4.1)
-    hike (1.2.1)
+    hike (1.2.3)
     i18n (0.6.1)
     journey (1.0.4)
     jquery-rails (2.1.2)
@@ -161,7 +161,7 @@ GEM
     mongoid_magic_counter_cache (0.1.1)
       mongoid (>= 2.2, <= 3.0)
       rake
-    multi_json (1.5.0)
+    multi_json (1.14.1)
     newrelic_rpm (3.4.1)
     nokogiri (1.5.4)
     orm_adapter (0.4.0)
@@ -172,7 +172,7 @@ GEM
       slop (~> 3.3.1)
     pry-rails (0.2.1)
       pry (>= 0.9.10)
-    rack (1.4.3)
+    rack (1.4.7)
     rack-cache (1.2)
       rack (>= 0.4)
     rack-livereload (0.3.6)
@@ -240,7 +240,7 @@ GEM
     spork-rails (3.2.0)
       rails (>= 3.0.0, < 3.3.0)
       spork (>= 1.0rc0)
-    sprockets (2.2.2)
+    sprockets (2.2.3)
       hike (~> 1.2)
       multi_json (~> 1.0)
       rack (~> 1.0)
@@ -251,7 +251,7 @@ GEM
       eventmachine (>= 0.12.6)
       rack (>= 1.0.0)
     thor (0.16.0)
-    tilt (1.3.3)
+    tilt (1.4.1)
     treetop (1.4.12)
       polyglot
       polyglot (>= 0.3.1)