Show screenshot in readme. [ci skip]

Author: thomasmassmann

README.rst

@@ -27,6 +27,9 @@ The Barceloneta New Generation Theme for Plone 5.
 
 This theme extends the original Barceloneta Theme (default Plone 5 theme) and adds an end-user configuration using `spirit.plone.theming <https://pypi.python.org/pypi/spirit.plone.theming>`_.
 
+.. image:: ./docs/_images/settings-color_option--default.png
+
+
 Features
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