Fix logo not displaying on getting started page

docs/source/inc_README.rst

@@ -1 +1,6 @@
+.. figure:: ../../images_shared/gprMax_logo_small.png
+    :target: http://www.gprmax.com
+    :alt: gprMax
+
 .. include:: ../../README.rst
+    :start-after: .. include_in_docs_after_this_label