Adding limit and since to odb changes

orthancDatabaseBrowser.py

@@ -94,9 +94,9 @@ class orthancDB:
         response=self.net.delete(url)
         print(response.data)
 
-    def changes(self):
+    def changes(self,limit=10,since=0):
       url=self.net.getCoreURL()
-      url+='/changes'
+      url+=f'/changes?limit={limit}&since={since}'
       response=self.net.get(url)
       return extractJSON(response.data)