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.

lib/members.rb

@@ -0,0 +1,22 @@
+def find_member(name)
+  name = name.downcase
+  return items.find { |i| i[:kind] == 'member' and (
+    i[:title].downcase == name or
+    (i[:shortName] and i[:shortName].downcase == name) or
+    (i[:aliases] and i[:aliases].map { |a| a.downcase }.include?(name) )
+  ) }
+end
+
+def member_short_name(member)
+  return member[:shortName] || member[:title]
+end
+
+def member_link(name, short=true)
+  member = find_member(name)
+  if member
+    shortName = member_short_name(member)
+    return "<a href=\"/members/\##{html_escape(shortName)}\">#{short ? shortName : member[:title]}</a>"
+  else
+    return name
+  end
+end