Update gem dependencies

Gemfile.lock

@@ -12,7 +12,7 @@ GEM
     better_errors (1.0.1)
       coderay (>= 1.0.0)
       erubis (>= 2.6.6)
-    browser (0.2.1)
+    browser (0.3.2)
     coderay (1.1.0)
     coffee-script (2.2.0)
       coffee-script-source
@@ -20,7 +20,7 @@ GEM
     coffee-script-source (1.6.3)
     daemons (1.1.9)
     erubis (2.7.0)
-    ethon (0.6.1)
+    ethon (0.6.2)
       ffi (>= 1.3.0)
       mime-types (~> 1.18)
     eventmachine (1.0.3)
@@ -39,7 +39,7 @@ GEM
     mini_portile (0.5.2)
     minitest (4.7.5)
     multi_json (1.8.2)
-    nokogiri (1.6.0)
+    nokogiri (1.6.1)
       mini_portile (~> 0.5.0)
     options (2.3.0)
       fattr
@@ -56,7 +56,7 @@ GEM
     rack-test (0.6.2)
       rack (>= 1.0)
     rr (1.1.2)
-    sass (3.2.12)
+    sass (3.2.13)
     sinatra (1.4.4)
       rack (~> 1.4)
       rack-protection (~> 1.4)
@@ -84,14 +84,14 @@ GEM
     thread_safe (0.1.3)
       atomic
     tilt (1.4.1)
-    typhoeus (0.6.6)
-      ethon (~> 0.6.1)
+    typhoeus (0.6.7)
+      ethon (~> 0.6.2)
     tzinfo (0.3.38)
-    uglifier (2.3.2)
+    uglifier (2.4.0)
       execjs (>= 0.3.0)
       json (>= 1.8.0)
     unix_utils (0.0.15)
-    yajl-ruby (1.1.0)
+    yajl-ruby (1.2.0)
 
 PLATFORMS
   ruby