Sphinx: Add the nature theme

docs/_theme/nature/static/nature.css_t

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+/**
+ * Sphinx stylesheet -- default theme
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ */
+ 
+@import url("basic.css");
+ 
+/* -- page layout ----------------------------------------------------------- */
+ 
+body {
+    font-family: Arial, sans-serif;
+    font-size: 100%;
+    background-color: #111;
+    color: #555;
+    margin: 0;
+    padding: 0;
+}
+
+hr{
+    border: 1px solid #B1B4B6;
+}
+ 
+div.document {
+    background-color: #eee;
+}
+ 
+div.body {
+    background-color: #ffffff;
+    color: #3E4349;
+    padding: 0 30px 30px 30px;
+    font-size: 0.8em;
+}
+ 
+div.footer {
+    color: #555;
+    width: 100%;
+    padding: 13px 0;
+    text-align: center;
+    font-size: 75%;
+}
+ 
+div.footer a {
+    color: #444;
+    text-decoration: underline;
+}
+ 
+div.related {
+    background-color: #6BA81E;
+    line-height: 32px;
+    color: #fff;
+    text-shadow: 0px 1px 0 #444;
+    font-size: 0.80em;
+}
+ 
+div.related a {
+    color: #E2F3CC;
+}
+ 
+div.sphinxsidebar {
+    font-size: 0.75em;
+    line-height: 1.5em;
+}
+
+div.sphinxsidebarwrapper{
+    padding: 20px 0;
+}
+ 
+div.sphinxsidebar h3,
+div.sphinxsidebar h4 {
+    font-family: Arial, sans-serif;
+    color: #222;
+    font-size: 1.2em;
+    font-weight: normal;
+    margin: 0;
+    padding: 5px 10px;
+    background-color: #ddd;
+    text-shadow: 1px 1px 0 white
+}
+
+div.sphinxsidebar h4{
+    font-size: 1.1em;
+}
+ 
+div.sphinxsidebar h3 a {
+    color: #444;
+}
+ 
+ 
+div.sphinxsidebar p {
+    color: #888;
+    padding: 5px 20px;
+}
+ 
+div.sphinxsidebar p.topless {
+}
+ 
+div.sphinxsidebar ul {
+    margin: 10px 20px;
+    padding: 0;
+    color: #000;
+}
+ 
+div.sphinxsidebar a {
+    color: #444;
+}
+ 
+div.sphinxsidebar input {
+    border: 1px solid #ccc;
+    font-family: sans-serif;
+    font-size: 1em;
+}
+
+div.sphinxsidebar input[type=text]{
+    margin-left: 20px;
+}
+ 
+/* -- body styles ----------------------------------------------------------- */
+ 
+a {
+    color: #005B81;
+    text-decoration: none;
+}
+ 
+a:hover {
+    color: #E32E00;
+    text-decoration: underline;
+}
+ 
+div.body h1,
+div.body h2,
+div.body h3,
+div.body h4,
+div.body h5,
+div.body h6 {
+    font-family: Arial, sans-serif;
+    background-color: #BED4EB;
+    font-weight: normal;
+    color: #212224;
+    margin: 30px 0px 10px 0px;
+    padding: 5px 0 5px 10px;
+    text-shadow: 0px 1px 0 white
+}
+ 
+div.body h1 { border-top: 20px solid white; margin-top: 0; font-size: 200%; }
+div.body h2 { font-size: 150%; background-color: #C8D5E3; }
+div.body h3 { font-size: 120%; background-color: #D8DEE3; }
+div.body h4 { font-size: 110%; background-color: #D8DEE3; }
+div.body h5 { font-size: 100%; background-color: #D8DEE3; }
+div.body h6 { font-size: 100%; background-color: #D8DEE3; }
+ 
+a.headerlink {
+    color: #c60f0f;
+    font-size: 0.8em;
+    padding: 0 4px 0 4px;
+    text-decoration: none;
+}
+ 
+a.headerlink:hover {
+    background-color: #c60f0f;
+    color: white;
+}
+ 
+div.body p, div.body dd, div.body li {
+    text-align: justify;
+    line-height: 1.5em;
+}
+ 
+div.admonition p.admonition-title + p {
+    display: inline;
+}
+
+div.highlight{
+    background-color: white;
+}
+
+div.note {
+    background-color: #eee;
+    border: 1px solid #ccc;
+}
+ 
+div.seealso {
+    background-color: #ffc;
+    border: 1px solid #ff6;
+}
+ 
+div.topic {
+    background-color: #eee;
+}
+ 
+div.warning {
+    background-color: #ffe4e4;
+    border: 1px solid #f66;
+}
+ 
+p.admonition-title {
+    display: inline;
+}
+ 
+p.admonition-title:after {
+    content: ":";
+}
+ 
+pre {
+    padding: 10px;
+    background-color: White;
+    color: #222;
+    line-height: 1.2em;
+    border: 1px solid #C6C9CB;
+    font-size: 1.2em;
+    margin: 1.5em 0 1.5em 0;
+    -webkit-box-shadow: 1px 1px 1px #d8d8d8;
+    -moz-box-shadow: 1px 1px 1px #d8d8d8;
+}
+ 
+tt {
+    background-color: #ecf0f3;
+    color: #222;
+    padding: 1px 2px;
+    font-size: 1.2em;
+    font-family: monospace;
+}

docs/_theme/nature/static/pygments.css

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+.c { color: #999988; font-style: italic } /* Comment */
+.k { font-weight: bold } /* Keyword */
+.o { font-weight: bold } /* Operator */
+.cm { color: #999988; font-style: italic } /* Comment.Multiline */
+.cp { color: #999999; font-weight: bold } /* Comment.preproc */
+.c1 { color: #999988; font-style: italic } /* Comment.Single */
+.gd { color: #000000; background-color: #ffdddd } /* Generic.Deleted */
+.ge { font-style: italic } /* Generic.Emph */
+.gr { color: #aa0000 } /* Generic.Error */
+.gh { color: #999999 } /* Generic.Heading */
+.gi { color: #000000; background-color: #ddffdd } /* Generic.Inserted */
+.go { color: #111 } /* Generic.Output */
+.gp { color: #555555 } /* Generic.Prompt */
+.gs { font-weight: bold } /* Generic.Strong */
+.gu { color: #aaaaaa } /* Generic.Subheading */
+.gt { color: #aa0000 } /* Generic.Traceback */
+.kc { font-weight: bold } /* Keyword.Constant */
+.kd { font-weight: bold } /* Keyword.Declaration */
+.kp { font-weight: bold } /* Keyword.Pseudo */
+.kr { font-weight: bold } /* Keyword.Reserved */
+.kt { color: #445588; font-weight: bold } /* Keyword.Type */
+.m { color: #009999 } /* Literal.Number */
+.s { color: #bb8844 } /* Literal.String */
+.na { color: #008080 } /* Name.Attribute */
+.nb { color: #999999 } /* Name.Builtin */
+.nc { color: #445588; font-weight: bold } /* Name.Class */
+.no { color: #ff99ff } /* Name.Constant */
+.ni { color: #800080 } /* Name.Entity */
+.ne { color: #990000; font-weight: bold } /* Name.Exception */
+.nf { color: #990000; font-weight: bold } /* Name.Function */
+.nn { color: #555555 } /* Name.Namespace */
+.nt { color: #000080 } /* Name.Tag */
+.nv { color: purple } /* Name.Variable */
+.ow { font-weight: bold } /* Operator.Word */
+.mf { color: #009999 } /* Literal.Number.Float */
+.mh { color: #009999 } /* Literal.Number.Hex */
+.mi { color: #009999 } /* Literal.Number.Integer */
+.mo { color: #009999 } /* Literal.Number.Oct */
+.sb { color: #bb8844 } /* Literal.String.Backtick */
+.sc { color: #bb8844 } /* Literal.String.Char */
+.sd { color: #bb8844 } /* Literal.String.Doc */
+.s2 { color: #bb8844 } /* Literal.String.Double */
+.se { color: #bb8844 } /* Literal.String.Escape */
+.sh { color: #bb8844 } /* Literal.String.Heredoc */
+.si { color: #bb8844 } /* Literal.String.Interpol */
+.sx { color: #bb8844 } /* Literal.String.Other */
+.sr { color: #808000 } /* Literal.String.Regex */
+.s1 { color: #bb8844 } /* Literal.String.Single */
+.ss { color: #bb8844 } /* Literal.String.Symbol */
+.bp { color: #999999 } /* Name.Builtin.Pseudo */
+.vc { color: #ff99ff } /* Name.Variable.Class */
+.vg { color: #ff99ff } /* Name.Variable.Global */
+.vi { color: #ff99ff } /* Name.Variable.Instance */
+.il { color: #009999 } /* Literal.Number.Integer.Long */

docs/_theme/nature/theme.conf

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+[theme]
+inherit = basic
+stylesheet = nature.css
+pygments_style = tango
+
+[options]