Add photoswipe

Signed-off-by: Nikolaos Karaolidis <nick@karaolidis.com>

layouts/partials/header.html

@@ -1,7 +1,7 @@
 <header class="header">
   <div class="header-container">
     <div class="site-title">
-      <a href="{{- "/" | relURL -}}">{{ .Site.Title }}</a>
+      <a href="{{- relURL "" -}}">{{ .Site.Title }}</a>
     </div>
 
     <input
@@ -18,7 +18,7 @@
     <nav class="nav">
       <ul>
         {{ range .Site.Params.navigation }}
-          <li><a href="{{- .url -}}">{{ .name }}</a></li>
+          <li><a href="{{- .url | safeURL -}}">{{ .name }}</a></li>
         {{ end }}
       </ul>
     </nav>