updated gems and syntax

Author: GarthDB

_config.yml

@@ -23,7 +23,7 @@ author:
 description: Ramblings of Garth Braithwaite.
 twitter:
   username: garthdb
-gems:
+plugins:
 - jekyll-seo-tag
 - jekyll-feed
 exclude:
@@ -33,7 +33,7 @@ exclude:
 - README.md
 - LICENSE
 - CNAME
-baseurl: 
+baseurl:
 url: http://garthdb.com
 sass:
   sass_dir: css

index.html

@@ -2,7 +2,7 @@
 layout: default
 ---
 
-{% if site.categories.writings | size != 0 %}
+{% if site.categories.writings.size != 0 %}
 <section class="post-list">
   <h1>Writings</h1>
   <ul>
@@ -12,7 +12,7 @@ <h1>Writings</h1>
   </ul>
 </section>
 {% endif %}
-{% if site.categories.talks | size != 0 %}
+{% if site.categories.talks.size != 0 %}
 <section class="post-list">
   <h1>Talks</h1>
   <ul>
@@ -22,7 +22,7 @@ <h1>Talks</h1>
   </ul>
 </section>
 {% endif %}
-{% if site.categories.projects | size != 0 %}
+{% if site.categories.projects.size != 0 %}
 <section class="post-list">
   <h1>Projects</h1>
   <ul>
@@ -32,7 +32,7 @@ <h1>Projects</h1>
   </ul>
 </section>
 {% endif %}
-{% if site.categories.stuff | size != 0 %}
+{% if site.categories.stuff.size != 0 %}
 <section class="post-list">
   <h1>Stuff</h1>
   <ul>