Gantt Plot Samples (version 1)
ganttPlotSamples_v1(bottleEvents, endTimeOffsets)data frame as returned by samplingEventsToBottleEvents,
with begin and end of time intervals represented by an auto sampler's bottle.
vector of integer offsets determining new end times for the bottle events by: bottleEvents$tEnd <- bottleEvents$tBeg + 60*endTimeOffsets - 1
ganttPlotSamples version 1