Update gem dependencies

Gemfile.lock

@@ -1,7 +1,7 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    activesupport (4.1.2)
+    activesupport (4.1.4)
       i18n (~> 0.6, >= 0.6.9)
       json (~> 1.7, >= 1.7.7)
       minitest (~> 5.1)
@@ -13,10 +13,10 @@ GEM
       erubis (>= 2.6.6)
     browser (0.6.0)
     coderay (1.1.0)
-    coffee-script (2.2.0)
+    coffee-script (2.3.0)
       coffee-script-source
       execjs
-    coffee-script-source (1.7.0)
+    coffee-script-source (1.7.1)
     daemons (1.1.9)
     erubis (2.7.0)
     ethon (0.7.1)
@@ -26,16 +26,16 @@ GEM
     ffi (1.9.3)
     highline (1.6.21)
     hike (1.2.3)
-    html-pipeline (1.8.0)
+    html-pipeline (1.9.0)
       activesupport (>= 2)
       nokogiri (~> 1.4)
-    i18n (0.6.9)
+    i18n (0.6.11)
     json (1.8.1)
     method_source (0.8.2)
     mini_portile (0.6.0)
-    minitest (5.3.5)
+    minitest (5.4.0)
     multi_json (1.10.1)
-    nokogiri (1.6.2.1)
+    nokogiri (1.6.3)
       mini_portile (= 0.6.0)
     options (2.3.2)
     progress_bar (1.0.2)
@@ -51,7 +51,7 @@ GEM
     rack-test (0.6.2)
       rack (>= 1.0)
     rr (1.1.2)
-    sass (3.3.9)
+    sass (3.3.10)
     sinatra (1.4.5)
       rack (~> 1.4)
       rack-protection (~> 1.4)
@@ -63,7 +63,7 @@ GEM
       rack-test
       sinatra (~> 1.4.0)
       tilt (~> 1.3)
-    slop (3.5.0)
+    slop (3.6.0)
     sprockets (2.12.1)
       hike (~> 1.2)
       multi_json (~> 1.0)
@@ -82,7 +82,7 @@ GEM
       ethon (>= 0.7.1)
     tzinfo (1.2.1)
       thread_safe (~> 0.1)
-    uglifier (2.5.1)
+    uglifier (2.5.3)
       execjs (>= 0.3.0)
       json (>= 1.8.0)
     unix_utils (0.0.15)