Add alt descriptions to feature images

_pages/home.md

@@ -11,19 +11,19 @@ header:
 excerpt: 'A flexible two-column Jekyll theme. Perfect for personal sites, blogs, and portfolios hosted on GitHub or your own server.<br /> <small>Currently at version 3.0.1</small><br /><br /> {::nomarkdown}<iframe style="display: inline-block;" src="https://ghbtns.com/github-btn.html?user=mmistakes&repo=minimal-mistakes&type=star&count=true&size=large" frameborder="0" scrolling="0" width="160px" height="30px"></iframe> <iframe style="display: inline-block;" src="https://ghbtns.com/github-btn.html?user=mmistakes&repo=minimal-mistakes&type=fork&count=true&size=large" frameborder="0" scrolling="0" width="158px" height="30px"></iframe>{:/nomarkdown}'
 feature_row:
   - image_path: mm-customizable-feature.png
-    alt: ""
+    alt: "customizable"
     title: "Super Customizable"
     excerpt: "Everything from the menus, sidebars, comments, and more can be configured or set with YAML Front Matter."
     url: "/docs/configuration/"
     btn_label: "Learn More"
   - image_path: mm-responsive-feature.png
-    alt: ""
+    alt: "fully responsive"
     title: "Responsive Layouts"
     excerpt: "Built on HTML5 + CSS3. All layouts are fully responsive with helpers to augment your content."
     url: "/docs/layouts/"
     btn_label: "Learn More"
   - image_path: mm-free-feature.png
-    alt: ""
+    alt: "100% free"
     title: "100% Free"
     excerpt: "Free to use however you want under the MIT License."
     url: "/docs/license/"
@@ -36,4 +36,4 @@ intro:
 
 {% include feature_row id="intro" type="center" %}
 
-{% include feature_row %}
+{% include feature_row %}