Bug fix: repeating events appeared multiple times

The bug was that a repeating event appeared multiple times at the first
day it was scheduled/deadline; the reason is this package scrapes the
agenda for data and in day-mode an individual repeating events appears
in all the future dates so need to dedup it.

calfw-org.el

@@ -102,14 +102,16 @@ For example,
       (when (buffer-live-p org-agenda-buffer)
         org-agenda-buffer))
     (org-compile-prefix-format nil)
+    (delete-duplicates
     (loop for date in (cfw:enumerate-days begin end) append
           (loop for file in (or cfw:org-icalendars (org-agenda-files nil 'ifmode))
                 append
                 (progn
                   (org-check-agenda-file file)
                   (apply 'org-agenda-get-day-entries
                          file date
-                         cfw:org-agenda-schedule-args))))))
+                          cfw:org-agenda-schedule-args))))
+     :test (lambda (x y) (equal (cfw:org-tp x 'time) (cfw:org-tp y 'time))))))
 
 (defun cfw:org-onclick ()
   "Jump to the clicked org item."