Only show author image when set

Fixes `{nil, "picture"=>nil"}` in `_layouts/about.html` when author image isn't set in `_config.yml`.

Close #34

CHANGELOG.md

@@ -5,6 +5,11 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/)
 and this project adheres to [Semantic Versioning](http://semver.org/).
 
+## [Unreleased] - 
+
+### Fixed
+- Fixed `{nil, "picture"=>nil"}` in `_layouts/about.html` when author image isn't set. [#34](https://github.com/mmistakes/jekyll-theme-basically-basic/issues/34)
+
 ## [1.1.2] - 2017-09-14
 
 ### Fixed

_layouts/about.html

@@ -12,7 +12,9 @@ layout: default
       </div>
       <aside class="entry-sidebar">
         {% include author %}
+        {% if author_picture %}
           <img class="author-picture" src="{{ author_picture }}" alt="{{ author_name }}">
+        {% endif %}
       </aside>
     </div>
 

docs/_layouts/about.html

@@ -12,7 +12,9 @@ layout: default
       </div>
       <aside class="entry-sidebar">
         {% include author %}
+        {% if author_picture %}
           <img class="author-picture" src="{{ author_picture }}" alt="{{ author_name }}">
+        {% endif %}
       </aside>
     </div>