timetools 1.1-1

For 'subtime' functions (and associated), a 'first.day' argument is added. It indicates the first day of week in case of 'wday' subtime.

A 'lapply' function is added for TimeIntervalDataFrame, TimeInstantDataFrame and SubtimeDataFrame.

Plot functions for TimeIntervalDataFrame, TimeInstantDataFrame and SubtimeDataFrame return (invisibly) params used for the plot.