Update Jekyll config file with 4 entries

- Remove unneeded final blank line from HTML
- Fix HTML by removing unneeded closing div tag
- Malformed HTML markup is best seen in Firefox in view source mode and it shows up in red
- view-source:http://mruby.org/  line 174

https://github.com/jekyll/jekyll/blob/master/docs/_config.yml

Author: jbampton

_config.yml

@@ -1,6 +1,15 @@
 name: mruby
+title: Lightweight Ruby
+description: >- # this means to ignore newlines until "markdown:"
+  mruby is the lightweight implementation of the Ruby language complying to (part of) the ISO standard.
+  mruby can be linked and embedded within your application. We provide the interpreter program "mruby" and the
+  interactive mruby shell "mirb" as examples. You can also compile Ruby programs into compiled byte code using the
+  mruby compiler "mrbc". All those tools reside in the "bin" directory. "mrbc" is also able to generate compiled byte
+  code in a C source file, see the "mrbtest" program under the "test" directory for an example.
 markdown: kramdown
 highlighter: rouge
+url: https://mruby.org
+repository: https://github.com/mruby/mruby.github.io
 include: _index.html
 exclude:
 - Gemfile

_includes/_latest_news.html

@@ -3,7 +3,6 @@
     <h2>Latest News</h2>
   </div>
 </div>
-</div>
 <div class='row'>
   <div class="col-md-12">
     <ul class="posts">

_layouts/default.html

@@ -21,4 +21,4 @@
     {% include footer.html %}
 
   </body>
-</html>
+</html>

_layouts/post.html

@@ -21,4 +21,4 @@
     {% include footer.html %}
 
   </body>
-</html>
+</html>