Dynamically set version, link and date on frontpage

_config.yml

@@ -123,3 +123,7 @@ social:
 
   twitter:
     account: home_assistant
+
+current_major_version: 0
+current_minor_version: 31
+current_patch_version: 1

source/_posts/2016-10-22-flash-briefing-updater-hacktoberfest.markdown

@@ -4,6 +4,7 @@ title: "0.31: Reading you the news, some serious business, spooky hackery and a
 description: "Alexa Flash Briefing API support, Markdown in persistent notifications, a new updater component, Hacktoberfest and breaking Z-Wave changes."
 date: 2016-10-22 13:00:00 -0700
 date_formatted: "October 22, 2016"
+release_date: 2016-10-24 21:57:00 -0700
 author: Robbie Trencheny
 author_twitter: robbie
 comments: true

source/index.html

@@ -11,15 +11,17 @@ description: Open-source home automation platform running on Python 3. Track and
 hide_github_edit: true
 ---
 
+{% assign recent_release_post = site.categories['Release-Notes'].first %}
+
 <div class="frontpage">
   <div class="grid">
     <div class="grid__item one-third lap-one-third palm-one-whole">
       <div class='current-version material-card text'>
-        <h1>Current Version: 0.31.1</h1>
-        Released: <span class='release-date'>October 24, 2016</span>
+        <h1>Current Version: {{ site.current_major_version }}.{{ site.current_minor_version }}.{{ site.current_patch_version }}</h1>
+        Released: <span class='release-date' title='{{ recent_release_post.release_date }}'>{{ recent_release_post.release_date | date: '%B %d, %Y' }}</span>
 
         <div class='links'>
-          <a href='/blog/2016/10/22/flash-briefing-updater-hacktoberfest/'>Release notes</a>
+          <a href='{{ root_url }}{{ recent_release_post.url }}'>Release notes</a>
         </div>
       </div>
       <div class='join-community material-card text'>