Update gem dependencies

Gemfile

@@ -30,7 +30,7 @@ end
 
 group :docs do
   gem 'typhoeus'
-  gem 'nokogiri', '1.6.7.rc3'
+  gem 'nokogiri'
   gem 'html-pipeline'
   gem 'progress_bar', require: false
   gem 'unix_utils', require: false

Gemfile.lock

@@ -12,12 +12,13 @@ GEM
       coderay (>= 1.0.0)
       erubis (>= 2.6.6)
       rack (>= 0.9.0)
-    browser (1.0.1)
+    browser (1.1.0)
     coderay (1.1.0)
     coffee-script (2.4.1)
       coffee-script-source
       execjs
     coffee-script-source (1.10.0)
+    concurrent-ruby (1.0.0)
     daemons (1.2.3)
     erubis (2.7.0)
     ethon (0.8.0)
@@ -32,11 +33,11 @@ GEM
     i18n (0.7.0)
     json (1.8.3)
     method_source (0.8.2)
-    mini_portile (0.7.0.rc4)
+    mini_portile2 (2.0.0)
     minitest (5.8.3)
     multi_json (1.11.2)
-    nokogiri (1.6.7.rc3)
+    nokogiri (1.6.7.1)
-      mini_portile (~> 0.7.0.rc4)
+      mini_portile2 (~> 2.0.0.rc2)
     options (2.3.2)
     progress_bar (1.0.5)
       highline (~> 1.6)
@@ -52,7 +53,7 @@ GEM
       rack (>= 1.0)
     rake (10.4.2)
     rr (1.1.2)
-    sass (3.4.19)
+    sass (3.4.20)
     sinatra (1.4.6)
       rack (~> 1.4)
       rack-protection (~> 1.4)
@@ -65,7 +66,8 @@ GEM
       sinatra (~> 1.4.0)
       tilt (>= 1.3, < 3)
     slop (3.6.0)
-    sprockets (3.4.0)
+    sprockets (3.5.2)
+      concurrent-ruby (~> 1.0)
       rack (> 1, < 3)
     sprockets-helpers (1.2.1)
       sprockets (>= 2.2)
@@ -75,7 +77,7 @@ GEM
       rack (~> 1.0)
     thor (0.19.1)
     thread_safe (0.3.5)
-    tilt (2.0.1)
+    tilt (2.0.2)
     typhoeus (0.8.0)
       ethon (>= 0.8.0)
     tzinfo (1.2.2)
@@ -97,7 +99,7 @@ DEPENDENCIES
   erubis
   html-pipeline
   minitest
-  nokogiri (= 1.6.7.rc3)
+  nokogiri
   progress_bar
   pry (~> 0.10.0)
   rack