Support point intervals in some way

[AMDmi3]

See http://wiki.openstreetmap.org/wiki/Key:collection_times

[ypid]

I guess the easiest way to support this is to interpret each collection time as one minute open time range. I propose this since this would also reflect reality pretty good (the collection is not done in no time).

And based on that, someone could also count the collections pretty easy with the getOpenDuration.

[AMDmi3]

Collection times may not be an only usage for point intervals, and any random small range would be fake. There should be real zero-duration intervals.

[ypid]

All right. I understand your point. Any idea how to implement it, the way you suggested it? Implementing it was not my original intention but I know this code quite well by now. So if you know how, I could do it.

[ypid]

I currently implemented it as I suggested. This has also the advantage that points in time are also shown on the demo page without modification.