Add the old logo to the documentation

Author: Cito

docs/conf.py

@@ -81,4 +81,4 @@
 # relative to this directory. They are copied after the builtin static files,
 # so a file named "default.css" will overwrite the builtin "default.css".
 #html_static_path = ['_static']
-html_static_path = []
+html_static_path = ['css']

docs/css/custom.css

@@ -0,0 +1,4 @@
+.sphinxsidebar {
+	background: no-repeat center top url(logo.png);
+	padding-top: 128px;
+}