jf-actvitity: functioning route, ombi fixes

forgot to switch branches before doing a fix for #455, so it's in here
too. OmbiUserByJfID/getOmbiUser takes an optional email *string, to
optionally pass an override email address to search with, used when
changing it.

models.go

@@ -517,5 +517,10 @@ type LabelsDTO struct {
 }
 
 type ActivityLogEntriesDTO struct {
-	Entries []mediabrowser.ActivityLogEntry `json:"entries"`
+	Entries []ActivityLogEntryDTO `json:"entries"`
+}
+
+type ActivityLogEntryDTO struct {
+	mediabrowser.ActivityLogEntry
+	Date int64 `json:"Date"`
 }