Adds Belo Horizonte city as CodeRetreat hosting

Author: Guilherme Corsino

_data/events/Belo-Horizonte.json

@@ -0,0 +1,18 @@
+{
+  "title": "Global Day of Code Retreat 2017 - Belo Horizonte",
+  "url": "https://www.sympla.com.br/global-day-of-code-retreat---belo-horizonte__211542",
+  "moderators": [
+    "@guifroes",
+    "@guicorsino"
+  ],
+  "location": {
+    "city": "Belo Horizonte",
+    "country": "Brazil",
+    "coordinates": {
+      "latitude": -19.8157,
+      "longitude": -43.9542
+    },
+    "utcOffset": -3,
+    "timezone": "America/Sao_Paulo"
+  }
+}