[Release 2.4.0] Update CHANGELOG.md
# Change Log
+## [2.4.0] - 2016-02-10
+## Added
+* New Harvesters
+ * Research Registry Harvester
+ * SSOAR
+* Status API endpoint
+
+## Changed
+* Updated set_specs for University of Kansas
+* ClinicalTrials.gov now output registrations
+* Source icons are now stored in the database
+
+## Fixed
+* Removed "Notify" from the page title in the browsable API
+
## [2.3.0] - 2016-02-02
## Added
* Support for OSF Registries
