Update gem dependencies

Gemfile.lock

@@ -1,7 +1,7 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    activesupport (4.2.0)
+    activesupport (4.2.1)
       i18n (~> 0.7)
       json (~> 1.7, >= 1.7.7)
       minitest (~> 5.1)
@@ -18,13 +18,13 @@ GEM
       coffee-script-source
       execjs
     coffee-script-source (1.9.1)
-    daemons (1.2.1)
+    daemons (1.2.2)
     erubis (2.7.0)
     ethon (0.7.3)
       ffi (>= 1.3.0)
     eventmachine (1.0.7)
     execjs (2.4.0)
-    ffi (1.9.7)
+    ffi (1.9.8)
     highline (1.6.21)
     hike (1.2.3)
     html-pipeline (1.11.0)