added forum post for the latest missive

_posts/2015-08-31-monero-missive-for-the-week-of-2015-08-31.md

@@ -4,6 +4,7 @@ title: Monero Missives for the Week of 2015-08-31
 summary: Contributing to, and building, the Monero website
 tags: [monero missives, usability]
 author: Riccardo Spagni (fluffypony)
+forum: https://forum.getmonero.org/1/news-announcements-and-editorials/2368/monday-monero-missives-31-august-31st-2015
 ---
 
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