[enh] image result template added

searx/templates/result_templates/images.html

+<div class="image_result">
+    <p>
+        <span class="engines">{{ result.engine }}</span><br />
+        <a href="{{ result.img_src }}"><img src="{{ result.img_src }}" title={{ result.title }}/></a>
+        <br />
+        <span class="url"><a href="{{ result.url }}" class="small_font">original context</a></span>
+    </p>
+</div>