[Release 2.3.0] Update CHANGELOG.md
# Change Log
+## [2.3.0] - 2016-02-02
+## Added
+* Support for OSF Registries
+* New Harvesters
+ * University of Utah
+
+## Changed
+* Updated the API
+* Improved Elasticsearch mappings
+* Updated NIH and NSFAwards
+ * Affiliations are now gathered
+ * Non-Unique URLs are no longer collected
+* Lots of under the hood changes to make dev's lives easier
+
## [2.1.0] - 2016-12-16
## Added
* New Harvesters
