Add tasks for all the new languages

Task/Date-format/Ring/date-format.ring

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+dt = list(21)
+dt[1] = "abbreviated weekday name"
+dt[2] = "full weekday name"
+dt[3] = "abbreviated month name"
+dt[4] = "full month name"
+dt[5] = "Date & Time"
+dt[6] = "Day of the month"
+dt[7] = "Hour (24)"
+dt[8] = "Hour (12)"
+dt[9] = "Day of the year"
+dt[10] = "Month of the year"
+dt[11] = "Minutes after hour"
+dt[12] = "AM or PM"
+dt[13] = "Seconds after the hour"
+dt[14] = "Week of the year (sun-sat)"
+dt[15] = "day of the week"
+dt[16] = "date"
+dt[17] = "time"
+dt[18] = "year of the century"
+dt[19] = "year"
+dt[20] = "time zone"
+dt[21] = "percent sign"
+
+for i=1 to 21
+     see dt[i] + " : " + TimeList () [i] + nl
+next