Added new HTML theme `haiku`, inspired by the Haiku OS user guide.

doc/theming.rst

@@ -69,6 +69,10 @@ Builtin themes
 |                    |                    |
 | *traditional*      | *nature*           |
 +--------------------+--------------------+
+| |haiku|            |                    |
+|                    |                    |
+| *haiku*            |                    |
++--------------------+--------------------+
 
 .. |default|     image:: themes/default.png
 .. |sphinxdoc|   image:: themes/sphinxdoc.png
@@ -76,6 +80,7 @@ Builtin themes
 .. |agogo|       image:: themes/agogo.png
 .. |traditional| image:: themes/traditional.png
 .. |nature|      image:: themes/nature.png
+.. |haiku|       image:: themes/haiku.png
 
 Sphinx comes with a selection of themes to choose from.
 
@@ -161,6 +166,17 @@ These themes are:
 * **nature** -- A greenish theme.  There are currently no options beyond
   *nosidebar*.
 
+* **haiku** -- A theme without sidebar inspired by the `Haiku OS user guide
+  <http://www.haiku-os.org/docs/userguide/en/contents.html>`_.  The following
+  options are supported:
+
+  - **full_logo** (true or false, default false): If this is true, the header
+    will only show the :confval:`html_logo`.  Use this for large logos.  If this
+    is false, the logo (if present) will be shown floating right, and the
+    documentation title will be put in the header.
+  - **textcolor**, **headingcolor**, **linkcolor**, **visitedlinkcolor**,
+    **hoverlinkcolor** (CSS colors): Colors for various body elements.
+
 * **traditional** -- A theme resembling the old Python documentation.  There are
   currently no options beyond *nosidebar*.