diff --git a/Gemfile.lock b/Gemfile.lock
index 9647078..2a1d590 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,41 +1,41 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    actioncable (5.1.4)
-      actionpack (= 5.1.4)
+    actioncable (5.1.6)
+      actionpack (= 5.1.6)
       nio4r (~> 2.0)
       websocket-driver (~> 0.6.1)
-    actionmailer (5.1.4)
-      actionpack (= 5.1.4)
-      actionview (= 5.1.4)
-      activejob (= 5.1.4)
+    actionmailer (5.1.6)
+      actionpack (= 5.1.6)
+      actionview (= 5.1.6)
+      activejob (= 5.1.6)
       mail (~> 2.5, >= 2.5.4)
       rails-dom-testing (~> 2.0)
-    actionpack (5.1.4)
-      actionview (= 5.1.4)
-      activesupport (= 5.1.4)
+    actionpack (5.1.6)
+      actionview (= 5.1.6)
+      activesupport (= 5.1.6)
       rack (~> 2.0)
       rack-test (>= 0.6.3)
       rails-dom-testing (~> 2.0)
       rails-html-sanitizer (~> 1.0, >= 1.0.2)
-    actionview (5.1.4)
-      activesupport (= 5.1.4)
+    actionview (5.1.6)
+      activesupport (= 5.1.6)
       builder (~> 3.1)
       erubi (~> 1.4)
       rails-dom-testing (~> 2.0)
       rails-html-sanitizer (~> 1.0, >= 1.0.3)
-    activejob (5.1.4)
-      activesupport (= 5.1.4)
+    activejob (5.1.6)
+      activesupport (= 5.1.6)
       globalid (>= 0.3.6)
-    activemodel (5.1.4)
-      activesupport (= 5.1.4)
-    activerecord (5.1.4)
-      activemodel (= 5.1.4)
-      activesupport (= 5.1.4)
+    activemodel (5.1.6)
+      activesupport (= 5.1.6)
+    activerecord (5.1.6)
+      activemodel (= 5.1.6)
+      activesupport (= 5.1.6)
       arel (~> 8.0)
-    activesupport (5.1.4)
+    activesupport (5.1.6)
       concurrent-ruby (~> 1.0, >= 1.0.2)
-      i18n (~> 0.7)
+      i18n (>= 0.7, < 2)
       minitest (~> 5.1)
       tzinfo (~> 1.1)
     addressable (2.5.2)
@@ -43,16 +43,16 @@ GEM
     airbrussh (1.3.0)
       sshkit (>= 1.6.1, != 1.7.0)
     arel (8.0.0)
-    autoprefixer-rails (7.2.4)
+    autoprefixer-rails (8.3.0)
       execjs
     bcrypt_pbkdf (1.0.0)
     bindex (0.5.0)
-    bootstrap (4.0.0.beta3)
+    bootstrap (4.0.0)
       autoprefixer-rails (>= 6.0.3)
-      popper_js (>= 1.12.3, < 2)
+      popper_js (>= 1.12.9, < 2)
       sass (>= 3.5.2)
     builder (3.2.3)
-    capistrano (3.10.1)
+    capistrano (3.10.2)
       airbrussh (>= 1.0.0)
       i18n
       rake (>= 10.0.0)
@@ -68,42 +68,42 @@ GEM
     capistrano-rbenv (2.1.3)
       capistrano (~> 3.1)
       sshkit (~> 1.3)
-    capybara (2.16.1)
+    capybara (2.18.0)
       addressable
       mini_mime (>= 0.1.3)
       nokogiri (>= 1.3.3)
       rack (>= 1.0.0)
       rack-test (>= 0.5.4)
-      xpath (~> 2.0)
-    childprocess (0.8.0)
+      xpath (>= 2.0, < 4.0)
+    childprocess (0.9.0)
       ffi (~> 1.0, >= 1.0.11)
     chronic (0.10.2)
     coderay (1.1.2)
     colorator (1.1.0)
-    commonmarker (0.17.8)
+    commonmarker (0.17.9)
       ruby-enum (~> 0.5)
     concurrent-ruby (1.0.5)
-    crass (1.0.3)
-    dotenv (2.2.1)
-    dotenv-rails (2.2.1)
-      dotenv (= 2.2.1)
-      railties (>= 3.2, < 5.2)
+    crass (1.0.4)
+    dotenv (2.2.2)
+    dotenv-rails (2.2.2)
+      dotenv (= 2.2.2)
+      railties (>= 3.2, < 6.0)
     em-websocket (0.5.1)
       eventmachine (>= 0.12.9)
       http_parser.rb (~> 0.6.0)
-    email_address (0.1.6)
-      netaddr
+    email_address (0.1.9)
+      netaddr (~> 2.0)
       simpleidn
-    erubi (1.7.0)
+    erubi (1.7.1)
     erubis (2.7.0)
     eventmachine (1.2.5)
     exception_notification (4.2.2)
       actionmailer (>= 4.0, < 6)
       activesupport (>= 4.0, < 6)
     execjs (2.7.0)
-    ffi (1.9.18)
-    font-awesome-rails (4.7.0.2)
-      railties (>= 3.2, < 5.2)
+    ffi (1.9.23)
+    font-awesome-rails (4.7.0.4)
+      railties (>= 3.2, < 6.0)
     forwardable-extended (2.6.0)
     globalid (0.4.1)
       activesupport (>= 4.2.0)
@@ -122,12 +122,12 @@ GEM
       nokogiri (>= 1.6.0)
       ruby_parser (~> 3.5)
     http_parser.rb (0.6.0)
-    i18n (0.9.3)
+    i18n (0.9.5)
       concurrent-ruby (~> 1.0)
     jbuilder (2.7.0)
       activesupport (>= 4.2.0)
       multi_json (>= 1.2)
-    jekyll (3.7.0)
+    jekyll (3.7.3)
       addressable (~> 2.4)
       colorator (~> 1.0)
       em-websocket (~> 0.5)
@@ -140,7 +140,7 @@ GEM
       pathutil (~> 0.9)
       rouge (>= 1.7, < 4)
       safe_yaml (~> 1.0)
-    jekyll-sass-converter (1.5.1)
+    jekyll-sass-converter (1.5.2)
       sass (~> 3.4)
     jekyll-watch (2.0.0)
       listen (~> 3.0)
@@ -154,7 +154,7 @@ GEM
       rb-fsevent (~> 0.9, >= 0.9.4)
       rb-inotify (~> 0.9, >= 0.9.7)
       ruby_dep (~> 1.2)
-    loofah (2.1.1)
+    loofah (2.2.2)
       crass (~> 1.0.2)
       nokogiri (>= 1.5.9)
     mail (2.7.0)
@@ -164,12 +164,12 @@ GEM
     mini_mime (1.0.0)
     mini_portile2 (2.3.0)
     minitest (5.11.3)
-    multi_json (1.12.2)
+    multi_json (1.13.1)
     net-scp (1.2.1)
       net-ssh (>= 2.6.5)
     net-ssh (4.2.0)
-    netaddr (1.5.1)
-    nio4r (2.2.0)
+    netaddr (2.0.3)
+    nio4r (2.3.0)
     nokogiri (1.8.2)
       mini_portile2 (~> 2.3.0)
     pathutil (0.16.1)
@@ -178,51 +178,51 @@ GEM
     pry (0.11.3)
       coderay (~> 1.1.0)
       method_source (~> 0.9.0)
-    public_suffix (3.0.1)
-    puma (3.11.0)
+    public_suffix (3.0.2)
+    puma (3.11.4)
     rack (2.0.4)
-    rack-test (0.8.2)
+    rack-test (1.0.0)
       rack (>= 1.0, < 3)
-    rails (5.1.4)
-      actioncable (= 5.1.4)
-      actionmailer (= 5.1.4)
-      actionpack (= 5.1.4)
-      actionview (= 5.1.4)
-      activejob (= 5.1.4)
-      activemodel (= 5.1.4)
-      activerecord (= 5.1.4)
-      activesupport (= 5.1.4)
+    rails (5.1.6)
+      actioncable (= 5.1.6)
+      actionmailer (= 5.1.6)
+      actionpack (= 5.1.6)
+      actionview (= 5.1.6)
+      activejob (= 5.1.6)
+      activemodel (= 5.1.6)
+      activerecord (= 5.1.6)
+      activesupport (= 5.1.6)
       bundler (>= 1.3.0)
-      railties (= 5.1.4)
+      railties (= 5.1.6)
       sprockets-rails (>= 2.0.0)
     rails-dom-testing (2.0.3)
       activesupport (>= 4.2.0)
       nokogiri (>= 1.6)
-    rails-html-sanitizer (1.0.3)
-      loofah (~> 2.0)
-    rails_warden (0.5.8)
-      warden (>= 1.0.0)
-    railties (5.1.4)
-      actionpack (= 5.1.4)
-      activesupport (= 5.1.4)
+    rails-html-sanitizer (1.0.4)
+      loofah (~> 2.2, >= 2.2.2)
+    rails_warden (0.6.0)
+      warden (>= 1.2.0)
+    railties (5.1.6)
+      actionpack (= 5.1.6)
+      activesupport (= 5.1.6)
       method_source
       rake (>= 0.8.7)
       thor (>= 0.18.1, < 2.0)
-    rake (12.3.0)
-    rb-fsevent (0.10.2)
+    rake (12.3.1)
+    rb-fsevent (0.10.3)
     rb-inotify (0.9.10)
       ffi (>= 0.5.0, < 2)
     rbnacl (4.0.2)
       ffi
-    rouge (3.1.0)
+    rouge (3.1.1)
     ruby-enum (0.7.2)
       i18n
     ruby_dep (1.5.0)
-    ruby_parser (3.10.1)
+    ruby_parser (3.11.0)
       sexp_processor (~> 4.9)
     rubyzip (1.2.1)
     safe_yaml (1.0.4)
-    sass (3.5.4)
+    sass (3.5.6)
       sass-listen (~> 4.0.0)
     sass-listen (4.0.0)
       rb-fsevent (~> 0.9, >= 0.9.4)
@@ -233,11 +233,12 @@ GEM
       sprockets (>= 2.8, < 4.0)
       sprockets-rails (>= 2.0, < 4.0)
       tilt (>= 1.1, < 3)
-    selenium-webdriver (3.8.0)
+    selenium-webdriver (3.11.0)
       childprocess (~> 0.5)
-      rubyzip (~> 1.0)
-    sexp_processor (4.10.0)
-    simpleidn (0.0.9)
+      rubyzip (~> 1.2)
+    sexp_processor (4.11.0)
+    simpleidn (0.1.1)
+      unf (~> 0.1.4)
     spring (2.0.2)
       activesupport (>= 4.2)
     spring-watcher-listen (2.0.1)
@@ -251,23 +252,26 @@ GEM
       activesupport (>= 4.0)
       sprockets (>= 3.0.0)
     sqlite3 (1.3.13)
-    sshkit (1.15.1)
+    sshkit (1.16.0)
       net-scp (>= 1.1.2)
       net-ssh (>= 2.8.0)
     temple (0.8.0)
     thor (0.20.0)
     thread_safe (0.3.6)
     tilt (2.0.8)
-    turbolinks (5.0.1)
-      turbolinks-source (~> 5)
-    turbolinks-source (5.0.3)
-    tzinfo (1.2.4)
+    turbolinks (5.1.1)
+      turbolinks-source (~> 5.1)
+    turbolinks-source (5.1.0)
+    tzinfo (1.2.5)
       thread_safe (~> 0.1)
-    uglifier (4.1.2)
+    uglifier (4.1.9)
       execjs (>= 0.3.0, < 3)
+    unf (0.1.4)
+      unf_ext
+    unf_ext (0.0.7.5)
     warden (1.2.7)
       rack (>= 1.0)
-    web-console (3.5.1)
+    web-console (3.6.0)
       actionview (>= 5.0)
       activemodel (>= 5.0)
       bindex (>= 0.4.0)
@@ -277,8 +281,8 @@ GEM
     websocket-extensions (0.1.3)
     whenever (0.10.0)
       chronic (>= 0.6.3)
-    xpath (2.1.0)
-      nokogiri (~> 1.3)
+    xpath (3.0.0)
+      nokogiri (~> 1.8)
 
 PLATFORMS
   ruby
@@ -318,4 +322,4 @@ DEPENDENCIES
   whenever
 
 BUNDLED WITH
-   1.16.0
+   1.16.1