Merge pull request #168 from Cybraics/master

hugo 0.50 compatibility

Solves #166 
Solves #169 
Duplicates #167

Author: Pilskalns

layouts/partials/flex/body-aftercontent.html

@@ -39,7 +39,7 @@
 
 	<div>
 {{ $footer := print "_footer." .Lang }}
-{{ range where .Site.Pages "Source.BaseFileName" $footer }}
+{{ range where .Site.Pages "File.BaseFileName" $footer }}
   {{ .Content }} 
 {{else}}
   {{ if .Site.GetPage "page" "_footer.md" }}

layouts/partials/header.html

@@ -1,10 +1,10 @@
 {{ $header := print "_header." .Lang }}
-	{{ range where .Site.Pages "Source.BaseFileName" $header }}
+	{{ range where .Site.Pages "File.BaseFileName" $header }}
 	{{ .Content }} 
 	{{else}}
   {{ if .Site.GetPage "page" "_header.md" }}
     {{(.Site.GetPage "page" "_header.md").Content}}
   {{else}}
     <a class="baselink" href="{{.Site.BaseURL}}">{{.Site.Title}}</a>
   {{end}}
-{{end}}
+{{end}}