Update .gitignore to ignore node_modules

.gitignore

@@ -1,3 +1,4 @@
 _site
 .sass-cache
 Gemfile.lock
+node_modules

Gemfile.lock

@@ -1,126 +0,0 @@
-GEM
-  remote: https://rubygems.org/
-  specs:
-    RedCloth (4.2.9)
-    activesupport (4.2.0)
-      i18n (~> 0.7)
-      json (~> 1.7, >= 1.7.7)
-      minitest (~> 5.1)
-      thread_safe (~> 0.3, >= 0.3.4)
-      tzinfo (~> 1.1)
-    blankslate (2.1.2.4)
-    celluloid (0.16.0)
-      timers (~> 4.0.0)
-    classifier-reborn (2.0.3)
-      fast-stemmer (~> 1.0)
-    coffee-script (2.3.0)
-      coffee-script-source
-      execjs
-    coffee-script-source (1.9.0)
-    colorator (0.1)
-    execjs (2.3.0)
-    fast-stemmer (1.0.2)
-    ffi (1.9.6)
-    gemoji (2.1.0)
-    github-pages (33)
-      RedCloth (= 4.2.9)
-      github-pages-health-check (~> 0.2)
-      jekyll (= 2.4.0)
-      jekyll-coffeescript (= 1.0.1)
-      jekyll-mentions (= 0.2.1)
-      jekyll-redirect-from (= 0.6.2)
-      jekyll-sass-converter (= 1.2.0)
-      jekyll-sitemap (= 0.6.3)
-      jemoji (= 0.4.0)
-      kramdown (= 1.5.0)
-      liquid (= 2.6.1)
-      maruku (= 0.7.0)
-      mercenary (~> 0.3)
-      pygments.rb (= 0.6.1)
-      rdiscount (= 2.1.7)
-      redcarpet (= 3.1.2)
-      terminal-table (~> 1.4)
-    github-pages-health-check (0.2.1)
-      net-dns (~> 0.6)
-      public_suffix (~> 1.4)
-    hitimes (1.2.2)
-    html-pipeline (1.9.0)
-      activesupport (>= 2)
-      nokogiri (~> 1.4)
-    i18n (0.7.0)
-    jekyll (2.4.0)
-      classifier-reborn (~> 2.0)
-      colorator (~> 0.1)
-      jekyll-coffeescript (~> 1.0)
-      jekyll-gist (~> 1.0)
-      jekyll-paginate (~> 1.0)
-      jekyll-sass-converter (~> 1.0)
-      jekyll-watch (~> 1.1)
-      kramdown (~> 1.3)
-      liquid (~> 2.6.1)
-      mercenary (~> 0.3.3)
-      pygments.rb (~> 0.6.0)
-      redcarpet (~> 3.1)
-      safe_yaml (~> 1.0)
-      toml (~> 0.1.0)
-    jekyll-coffeescript (1.0.1)
-      coffee-script (~> 2.2)
-    jekyll-gist (1.1.0)
-    jekyll-mentions (0.2.1)
-      html-pipeline (~> 1.9.0)
-      jekyll (~> 2.0)
-    jekyll-paginate (1.1.0)
-    jekyll-redirect-from (0.6.2)
-      jekyll (~> 2.0)
-    jekyll-sass-converter (1.2.0)
-      sass (~> 3.2)
-    jekyll-sitemap (0.6.3)
-    jekyll-watch (1.2.1)
-      listen (~> 2.7)
-    jemoji (0.4.0)
-      gemoji (~> 2.0)
-      html-pipeline (~> 1.9)
-      jekyll (~> 2.0)
-    json (1.8.2)
-    kramdown (1.5.0)
-    liquid (2.6.1)
-    listen (2.8.5)
-      celluloid (>= 0.15.2)
-      rb-fsevent (>= 0.9.3)
-      rb-inotify (>= 0.9)
-    maruku (0.7.0)
-    mercenary (0.3.5)
-    mini_portile (0.6.2)
-    minitest (5.5.1)
-    net-dns (0.8.0)
-    nokogiri (1.6.6.2)
-      mini_portile (~> 0.6.0)
-    parslet (1.5.0)
-      blankslate (~> 2.0)
-    posix-spawn (0.3.9)
-    public_suffix (1.4.6)
-    pygments.rb (0.6.1)
-      posix-spawn (~> 0.3.6)
-      yajl-ruby (~> 1.2.0)
-    rb-fsevent (0.9.4)
-    rb-inotify (0.9.5)
-      ffi (>= 0.5.0)
-    rdiscount (2.1.7)
-    redcarpet (3.1.2)
-    safe_yaml (1.0.4)
-    sass (3.4.12)
-    terminal-table (1.4.5)
-    thread_safe (0.3.4)
-    timers (4.0.1)
-      hitimes
-    toml (0.1.2)
-      parslet (~> 1.5.0)
-    tzinfo (1.2.2)
-      thread_safe (~> 0.1)
-    yajl-ruby (1.2.1)
-
-PLATFORMS
-  ruby
-
-DEPENDENCIES
-  github-pages