Adding changes routine to orthancDatabaseInterface to track log of orthanc

orthancDatabaseBrowser.py

@@ -94,6 +94,12 @@ class orthancDB:
         response=self.net.delete(url)
         print(response.data)
 
+    def changes(self):
+      url=self.net.getCoreURL()
+      url+='/changes'
+      response=self.net.get(url)
+      return extractJSON(response.data)
+