removed crowbook and mdbook configand moved sphinx dirs one level up

Makefile adapted to new directory structure and mixed with the one from Sphinx

theme/wtf_epub/epub-cover.html

@@ -0,0 +1,23 @@
+{#
+epub/epub-cover.html
+~~~~~~~~~~~~~~~~~~~~
+
+Sample template for the html cover page.
+
+:copyright: Copyright 2007-2021 by the Sphinx team, see AUTHORS.
+:license: BSD, see LICENSE for details.
+#}
+{%- extends "layout.html" %}
+{%- block header %}{% endblock %}
+{%- block rootrellink %}{% endblock %}
+{%- block relbaritems %}{% endblock %}
+{%- block sidebarlogo %}{% endblock %}
+{%- block linktags %}{% endblock %}
+{%- block relbar1 %}{% endblock %}
+{%- block sidebar1 %}{% endblock %}
+{%- block sidebar2 %}{% endblock %}
+{%- block footer %}{% endblock %}
+
+{% block content %}
+<div class="epub-cover" style="background-image: url('{{ image }}');"></div>
+{% endblock %}

theme/wtf_epub/static/css/style.css

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+.epub-cover {
+    margin: 0;
+    padding: 0;
+    width: 100%;
+    height: 100%;
+    background-size: contain;
+    background-repeat: no-repeat;
+    background-position: center;
+}

theme/wtf_epub/theme.conf

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+[theme]
+inherit = epub
+stylesheet = css/style.css