Gem updates

Fixes #478
Fixes #479
Fixes #480
Fixes #481

Gemfile.lock

@@ -42,7 +42,7 @@ GEM
       activerecord (>= 3.0.0)
       activesupport (>= 3.0.0)
     arel (6.0.3)
-    autoprefixer-rails (6.3.3.1)
+    autoprefixer-rails (6.3.4)
       execjs
     bootstrap-sass (3.3.6)
       autoprefixer-rails (>= 5.2.1)
@@ -71,7 +71,7 @@ GEM
       term-ansicolor (~> 1.3)
       thor (~> 0.19.1)
       tins (~> 1.6.0)
-    css_parser (1.4.0)
+    css_parser (1.4.1)
       addressable
     dalli (2.7.6)
     database_cleaner (1.5.1)
@@ -225,10 +225,10 @@ GEM
     premailer (1.8.6)
       css_parser (>= 1.3.6)
       htmlentities (>= 4.0.0)
-    premailer-rails (1.9.0)
+    premailer-rails (1.9.1)
       actionmailer (>= 3, < 5)
       premailer (~> 1.7, >= 1.7.9)
-    puma (3.1.1)
+    puma (3.2.0)
     quiet_assets (1.1.0)
       railties (>= 3.1, < 5.0)
     rack (1.6.4)
@@ -309,7 +309,7 @@ GEM
     safe_yaml (1.0.4)
     sanitize-url (0.1.4)
     sass (3.4.21)
-    sassc (1.8.4)
+    sassc (1.8.5)
       bundler
       ffi (~> 1.9.6)
       sass (>= 3.3.0)
@@ -359,10 +359,10 @@ GEM
     sprockets (3.5.2)
       concurrent-ruby (~> 1.0)
       rack (> 1, < 3)
-    sprockets-rails (2.3.3)
-      actionpack (>= 3.0)
-      activesupport (>= 3.0)
-      sprockets (>= 2.8, < 4.0)
+    sprockets-rails (3.0.4)
+      actionpack (>= 4.0)
+      activesupport (>= 4.0)
+      sprockets (>= 3.0.0)
     sql_queries_count (0.0.1)
       rails (> 3.0.0)
     stripe (1.20.1)