add missing alt tags on images

Author: jwcooper

blinka.html

@@ -50,7 +50,7 @@ <h2>Sort By</h2>
           <a href="{{ board.url | relative_url }}">
             <div>
               <div class="img-responsive-4by3">
-                <img src="{{ board.board_image | relative_url }}">
+                <img src="{{ board.board_image | relative_url }}" alt="Image of Board">
               </div>
               <div class="details">
                 <h3>{{ board.name }}</h3>

downloads.html

@@ -57,7 +57,7 @@ <h2>Sort By</h2>
       {% if info.downloads_display == false %}
         {% continue %}
       {% endif %}
-      
+
       <div class="download" data-id="{{ board.id }}"
                             data-name="{{ info.name | default: board.id }}"
                             data-downloads="{{ board.downloads }}"
@@ -66,7 +66,7 @@ <h2>Sort By</h2>
         <a href="{{ info.url | relative_url }}">
           <div>
             <div class="img-responsive-4by3">
-              <img src="{{ info.board_image | relative_url }}">
+              <img src="{{ info.board_image | relative_url }}" alt="Image of Board">
             </div>
             <div class="details">
               <h3>{{ info.name | default: board.id }}</h3>
@@ -92,7 +92,7 @@ <h3>{{ info.name | default: board.id }}</h3>
           <a href="{{ board.url | relative_url }}">
             <div>
               <div class="img-responsive-4by3">
-                <img src="{{ board.board_image | relative_url }}">
+                <img src="{{ board.board_image | relative_url }}" alt="Image of Board">
               </div>
               <div class="details">
                 <h3>{{ board.name }}</h3>