Dealing with some time stamps not including seconds

[ToonTalk]

truncated=2 is OK but it does leave an ambiguity in the display between those time stamps whose seconds is zero and those not. Only one that has non-zero seconds -- perhaps should also describe how one can display time without any mention of seconds.

In http://ox-it.github.io/OxfordIDN_htmlwidgets/datatable/

[charliejhadley]

Fix the data file so that all times have seconds missing, negating the need for truncated.