Update 2016-11-18-Powel.md

Fixing date.

_posts/2016-11-18-Powel.md

@@ -4,7 +4,7 @@ title:  "Using IoT to detect water leakages with Powel"
 author: "Pedro Dias"
 author-link: "#"
 #author-image: "../images/powel/pedrodias.jpg"
-date:   2016-11-30
+date:   2016-11-29
 categories: IoT
 color: "blue"
 #image: "{{ site.baseurl }}/images/imagename.png" #should be ~350px tall