Author/speakers can link to member page

If author/speaker is a member's name (or short name, or alias),
a link to the members' page will be set.

content/members/index.erb

@@ -5,7 +5,7 @@ kind: page
 <p>Hier finden sich ein paar Infos zu einigen unserer Mitglieder.</p>
 
 <% @items.select { |i| i[:kind] == 'member' }.each do |member| %>
-<h2><a id="<%= member[:title] %>"><%= member[:title] %></a></h2>
+<h2 id="<%= html_escape(member_short_name(member)) %>"><%= member[:title] %></h2>
 <ul>
   <% if member[:pgp] %>
   <li>PGP-Key: <a href="https://sks-keyservers.net/pks/lookup?op=get&search=<%= member[:pgp] %>"><%= member[:pgp] %></a></li>

content/members/leibi.md

@@ -1,5 +1,8 @@
 -----
-title: Leibi (Stefan Leibfarth)
+title: Stefan 'Leibi' Leibfarth
+shortName: Leibi
+aliases:
+  - Stefan Leibfarth (Leibi)
 kind: member
 pgp: "0xE5CEBB2AC1354426"
 url: https://stefan.leibfarth.org/

content/members/princess.md

@@ -1,5 +1,6 @@
 -----
-title: Princess
+title: Andrea 'Princess' Wardzichowski
+shortName: Princess
 kind: member
 pgp: "0x9E5343DB80CE19A7"
 url: http://blog.querulantin.de/

content/members/rince.md

@@ -1,5 +1,6 @@
 -----
-title: Rince
+title: Hanno 'Rince' Wagner
+shortName: Rince
 kind: member
 pgp: "0xA75723A176CDE3460449956A7C3192F14CF2D85A"
 url: http://blog.rince.de/

content/members/skyr.md

@@ -1,5 +1,8 @@
 -----
-title: Skyr
+title: Stefan 'Skyr' Schlott
+shortName: Skyr
+aliases:
+  - Stefan Schlott
 kind: member
 pgp: "0xFDF44AE875FD7074"
 url: http://stefan.ploing.de/