Added logo to docs

docs/source/_templates/sidebarlogo.html

@@ -0,0 +1,3 @@
+<p class="logo"><a href="{{ pathto(master_doc) }}">
+  <img class="logo" src="{{ pathto('_static/logo.png', 1) }}" alt="Logo"/>
+</a></p>

docs/source/_themes/flask/theme.conf

@@ -4,6 +4,6 @@ stylesheet = flasky.css
 pygments_style = flask_theme_support.FlaskyStyle
 
 [options]
-index_logo = ''
+index_logo = 
 index_logo_height = 120px
 touch_icon = 

docs/source/conf.py

@@ -139,7 +139,10 @@ html_static_path = ['_static']
 #html_use_smartypants = True
 
 # Custom sidebar templates, maps document names to template names.
-#html_sidebars = {}
+html_sidebars = {
+    '**': ['sidebarlogo.html', 'localtoc.html', 'relations.html',
+           'sourcelink.html', 'searchbox.html']
+}
 
 # Additional templates that should be rendered to pages, maps page names to
 # template names.