Timeline plotting: horizontal bars of time intervals

This text file logs the time that a process (identified by a number) changes state ("Brown", "Blue" etc.")

2014-08-29 03:59:52 , 27273 , Brown
2014-08-29 03:59:53 , 27276 , Green
2014-08-29 03:59:55 , 27276 , Brown
2014-08-29 03:59:57 , 27303 , Red
2014-08-29 03:59:58 , 27303 , Green
2014-08-29 03:59:59 , 27303 , Brown
2014-08-29 04:00:04 , 27317 , Brown
2014-08-29 04:00:07 , 27331 , Blue
2014-08-29 04:00:07 , 27334 , Blue

2014-08-29 04:00:08 , 27331 , Red
2014-08-29 04:00:08 , 27334 , Cyan

What I try to do is to plot horizontal bars as time intervals, colored according to the third column, where x-axis is time, y-axis is process id number. One of the colors (probably Cyan) should not be displayed, as it marks the interval end.

It is actually a timeline of many parallel events.

DatePlot does not seem to help. Any suggestions?

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