WIP:HIFIS Websites unification

First draft of what could become a unified HIFIS homepage.

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Known issues / to be solved:

• Unify teams from SCC and HIFIS coords + represent accordingly
• Services: We need much better description/overview of
  • Cloud Services
    • also to be linkable back from portal
  • Software Services: (here and here)
  • Guidelines
• "Contact" leads to general HIFIS contact page, but "Consulting" is more hidden so far.
• services/consulting: no iframe inclusion, instead hard link to lime survey. Don't know if that makes sense.
• multiple broken format things, especially with event cards and taken-over SCC blog posts

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To be noted / to be redone when finishing the unification:

• big png file for docker: has been preliminarily resolved here.
• two November blog posts on survey have been renamed here, to have consistent dates.

_includes/frontpage/title-content.html

@@ -8,13 +8,13 @@
             <i class="fas fa-user-plus"></i> HIFIS Services for you
         </a>
         <a href="{{ '/services/training' | relative_url }}" class="btn btn-light btn-lg text-dark">
-            <i class="fas fa-university"></i> Education &amp; Training
+            <i class="fas fa-university"></i> Education + Training
         </a>
         <a href="https://hifis-tp.desy.de/oauth2/authorization/unity" class="btn btn-light btn-lg text-dark">
             <i class="fas fa-cloud"></i> Helmholtz Cloud (login)
         </a>
         <a href="{{ '/contact.html' | relative_url }}" class="btn btn-light btn-lg text-dark">
-            <i class="fas fa-question"></i> Consulting, Support &amp; Contact
+            <i class="fas fa-question"></i> Consulting, Support + Contact
         </a>
     </div>
 </div>