add jekyll plugins to gemfile

Gemfile

@@ -5,6 +5,7 @@ source 'https://rubygems.org'
 
 group :development, :test do
   gem 'jekyll', '~> 2.5.2'
+  gem 'jekyll-redirect-from', '~> 0.8.0'
   gem 'rouge', '~> 1.7.4'
   gem 'sass', '~> 3.4.9'
   gem 'scss-lint', '~> 0.31'

Gemfile.lock

@@ -34,6 +34,8 @@ GEM
       coffee-script (~> 2.2)
     jekyll-gist (1.1.0)
     jekyll-paginate (1.1.0)
+    jekyll-redirect-from (0.8.0)
+      jekyll (>= 2.0)
     jekyll-sass-converter (1.3.0)
       sass (~> 3.2)
     jekyll-watch (1.2.0)
@@ -73,6 +75,10 @@ PLATFORMS
 
 DEPENDENCIES
   jekyll (~> 2.5.2)
+  jekyll-redirect-from (~> 0.8.0)
   rouge (~> 1.7.4)
   sass (~> 3.4.9)
   scss-lint (~> 0.31)
+
+BUNDLED WITH
+   1.10.5