Update dependencies

Gemfile.lock

@@ -1,20 +1,23 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    daemons (1.1.0)
-    eventmachine (0.12.10)
-    rack (1.2.1)
-    rake (10.1.1)
-    shotgun (0.8)
+    daemons (1.1.9)
+    eventmachine (1.0.3)
+    rack (1.5.2)
+    rack-protection (1.5.3)
+      rack
+    rake (10.3.2)
+    shotgun (0.9)
       rack (>= 1.0)
-    sinatra (1.1.2)
-      rack (~> 1.1)
-      tilt (~> 1.2)
-    thin (1.2.7)
+    sinatra (1.4.5)
+      rack (~> 1.4)
+      rack-protection (~> 1.4)
+      tilt (~> 1.3, >= 1.3.4)
+    thin (1.6.2)
       daemons (>= 1.0.9)
-      eventmachine (>= 0.12.6)
+      eventmachine (>= 1.0.0)
       rack (>= 1.0.0)
-    tilt (1.2.1)
+    tilt (1.4.1)
 
 PLATFORMS
   ruby