Reduce liquid's whitespace for a few pages.

Also fix a couple of typos while at it and change header tags' order.

_includes/header.html

@@ -3,15 +3,13 @@
 <meta name="generator" content="Jekyll v{{ jekyll.version }}">
 
 <title>
-  {% if page.title %}
+  {%- if page.title -%}
     {{ page.title }} &middot; {{ site.title }}
-  {% else %}
+  {%- else -%}
     {{ site.title }} &middot; {{ site.description }}
-  {% endif %}
+  {%- endif -%}
 </title>
 
-{% include social.html %}
-
 <!-- Bootstrap core CSS -->
 {% if site.github %}
   <link href="{{ site.baseurl }}/dist/css/bootstrap.min.css" rel="stylesheet">
@@ -25,6 +23,8 @@
 {% endif %}
 <link href="{{ site.baseurl }}/assets/css/docs.min.css" rel="stylesheet">
 
+{% include social.html %}
+
 <script>
   (function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){
   (i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),