FIX: ushahidi/platform-pattern-library#23

* Posts without a title now link to post detail.

if no post title is entered the post content is displayed as the title, with a 50 character maximum and an elipsis to avoid awkward mid word/sentence break.

server/www/templates/posts/preview.html

@@ -18,7 +18,7 @@
         </div>
         <div class="post-text">
             <a href="/posts/{{post.id}}">
-                <h3>{{post.title}}</h3>
+                <h3>{{ post.title || post.content | limitTo:50 }} ...</h3>
             </a>
             <p>
                 {{post.content}}
@@ -61,7 +61,7 @@ <h4 class="delta-alt" translate>
 -->
                 <collection-selector
                     post="post"
-                    ng-if="post.allowed_privileges.indexOf('update') !== -1" 
+                    ng-if="post.allowed_privileges.indexOf('update') !== -1"
                     ng-show="editableCollections.length > 0 || post.allowed_privilleges.indexOf('update') != 1"
                     >
                 </collection-selector>
@@ -77,5 +77,3 @@ <h4 class="delta-alt" translate>
         </span>
 -->
 </div>
-
-