Adds benchmark intro to _config file and updates the UI a bit

Author: theangryhobbit

_config.yml

@@ -30,6 +30,7 @@ gitter: https://gitter.im/rustpython/Lobby
 show_excerpts: true
 contributor_excerpt: "" # TODO: write something here, goes right under "Contributors" heading
 blog-intro: Create an issue if you see something wrong. Edit posts or create new ones via PR on <a target="_blank" href="https://github.com/RustPython/rustpython.github.io">github.com/RustPython/rustpython.github.io</a>
+benchmarks-intro: More information about the benchmarks can be found on <a target="_blank" href="https://github.com/RustPython/RustPython">github.com/RustPython/RustPython</a>
 
 navigation:
   - title: Blog

_layouts/benchmarks.html

@@ -21,7 +21,7 @@
     <div class="benchmarks-intro">
         {{ content }}
     </div>
-   
+
     {% assign folders = "" | split: ", " %}
     {% for folder in site.static_files %}
         {% if folder.path contains 'criterion/' %}
@@ -40,7 +40,7 @@
     {% else %}
     <ul class="tab" data-tab="benchmarks">
         {% for folder in folders %}
-        <li {% if forloop.index==1 %} class="active" {% endif %}>
+        <li {% if forloop.index==1 %} class="active" {% endif %} style="font-weight: bold;">
             <a href="">{{ folder }}</a>
         </li>
         {% endfor%}

assets/style.css

@@ -279,7 +279,7 @@ ul.list-inline {
   line-height: 1.5em;
 }
 
-.blog-intro {
+.blog-intro, .benchmarks-intro {
   background-color: #f6f8fa;
   padding-left: 2em;
   padding-right: 2em;

benchmarks.markdown

@@ -6,5 +6,3 @@ title: Benchmarks
 This page displays some benchmarks that determine the performance of RustPython.
 
 Most of these benchmarks compare RustPython to CPython.
-
-More information about the benchmarks can be found on [the RustPython GitHub repo](https://github.com/RustPython/RustPython/tree/master/benches).