Fixes #58, Undefined event information
Actually I think this was fixed as a side effect of other work,
this fixes the case where the eventInformation() data is updated
when a load event arrives. The eventInformation() should not
change unless the user is hovering over the logScrubber and thus
changing the selected turn, showTurn(). By testing the showTurn()
value first we avoid updating eventInformation unless showTurn > 0.