Add new index page for Canada 2017

canada-2017/index.md

+---
+comments: false
+layout: page
+title: "Trip: Canada 2017"
+category: canada-2017
+--- 
+
+<ul id='archive'>{% assign sorted_posts = (site.posts | where: "categories" , page.category) %}
+{% for post in sorted_posts %}
+    {% include archives.html %}
+{% endfor %}
+</ul>
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