Set rel attributes to links (fixes #40)

templates/partials/nav.html

@@ -1,3 +1,5 @@
+{%- set rel_attributes = macros_rel_attributes::rel_attributes() | trim -%}
+
 <header id="site-nav">
 	<nav>
 		<a href="#main" id="main-content" tabindex="0">
@@ -15,7 +17,7 @@
 			{%- for link in config.extra.nav.links %}
 				{%- if link.url is matching('https?://') %}
 					<li>
-						<a href="{{ link.url }}"
+						<a href="{{ link.url }}" rel="{{ rel_attributes }}"
 							{%- if current_url | default(value='/') | trim_end_matches(pat='/') | safe == link.url | trim_end_matches(pat='/') | safe -%}
 								class="active"
 							{%- endif -%}>