Stubbed CHANGELOG for Snowplow Tracker Core version 0.2.0

Author: fblundun

core/CHANGELOG

@@ -1,3 +1,10 @@
+Version 0.2.0 (2014-08-xx)
+--------------------------
+Added timestamp parameter to tracker methods (#240) (TODO)
+Added dependendencies field to package.json (#239) (TODO)
+Added npm button to README (#238) (TODO)
+Updated README (#237) (TODO)
+
 Version 0.1.0 (2014-08-01)
 --------------------------
 Initial release