added cheatsheet reference to emacs' org-mode documentation

VimOrganizerCheatsheet.org

@@ -29,15 +29,15 @@
 
     gg=G                 normal mode command to reformat line
                         indents in entire document
-** Time Stamps
+** Time Stamps/Date-time prompt
    The following commands may be issued anywhere within a headline and will 
    enter or edit the corresponding date for the headline.  One date of 
    each type may be defined per headline (i.e, 'deadline', 'scheduled', 
    'closed', and 'regular'.  You can enter more dates anywhere you want, but 
    this editing mechanism is currently restricted to dealing with only these
    "primary" dates.
 
- enter DEADLINE date for headline 
+ enter DEADLINE date for headline
     :,dd
  enter SCHEDULED date for headline
     :,ds
@@ -47,6 +47,13 @@
     :,dr
  enter timestamp into text
     :<F9>
+
+    The command-line prompt and calendar that appear when you enter a :d<x> 
+    command operate nearly the same as the date-time prompt in Emacs' 
+    Org-mode.  A few options are not yet implemented (e.g., the 'w'eek 
+    options), but most should work just the same.  For excellent documentation 
+    on Org-mode's date-time prompt see:
+    :http://orgmode.org/manual/The-date_002ftime-prompt.html#The-date_002ftime-prompt 
 ** Agenda Dashboard
    Type ,ag to bring up the Agenda Dashboard, which allows you to launch 
    some searches.