Add Nelkinda and e-zest coderetreats in Pune. (coderetreat#216)

* Add Nelkinda and e-zest coderetreats in Pune.

* Moved sponsors to the `sponsor` field.

Author: christianhujer

_data/events/Pune-2.json

@@ -0,0 +1,21 @@
+{
+    "title": "GDCR17 e-zest, Pune",
+    "url": "http://www.e-zest.com/gdcr-2017",
+    "moderators": [
+        "@christianhujer"
+    ],
+    "sponsors": [
+        "@nelkinda",
+        "@ezest"
+    ],
+    "location": {
+        "city": "Pune",
+        "country": "India",
+        "coordinates": {
+            "latitude": 18.578799,
+            "longitude": 73.7378663
+        },
+        "utcOffset": 5.5,
+        "timezone": "Asia/Kolkata"
+    }
+}

_data/events/Pune.json

@@ -0,0 +1,20 @@
+{
+    "title": "GDCR17 Nelkinda, Pune",
+    "url": "http://nelkinda.com/events/2017/11/18/Global-Day-of-Coderetreat/pune-nelkinda",
+    "moderators": [
+        "@SiddheshNikude"
+    ],
+    "sponsors": [
+        "@nelkinda"
+    ],
+    "location": {
+        "city": "Pune",
+        "country": "India",
+        "coordinates": {
+            "latitude": 18.521246,
+            "longitude": 73.7764523
+        },
+        "utcOffset": 5.5,
+        "timezone": "Asia/Kolkata"
+    }
+}