Update gem dependencies

Gemfile.lock

@@ -17,7 +17,7 @@ GEM
     coffee-script (2.3.0)
       coffee-script-source
       execjs
-    coffee-script-source (1.8.0)
+    coffee-script-source (1.9.0)
     daemons (1.1.9)
     erubis (2.7.0)
     ethon (0.7.2)
@@ -36,7 +36,7 @@ GEM
     mini_portile (0.6.2)
     minitest (5.5.1)
     multi_json (1.10.1)
-    nokogiri (1.6.5)
+    nokogiri (1.6.6.2)
       mini_portile (~> 0.6.0)
     options (2.3.2)
     progress_bar (1.0.3)
@@ -52,7 +52,7 @@ GEM
     rack-test (0.6.3)
       rack (>= 1.0)
     rr (1.1.2)
-    sass (3.4.9)
+    sass (3.4.11)
     sinatra (1.4.5)
       rack (~> 1.4)
       rack-protection (~> 1.4)
@@ -79,7 +79,7 @@ GEM
     thor (0.19.1)
     thread_safe (0.3.4)
     tilt (1.4.1)
-    typhoeus (0.7.0)
+    typhoeus (0.7.1)
       ethon (>= 0.7.1)
     tzinfo (1.2.2)
       thread_safe (~> 0.1)