when generating bw files

filtering results

when creating a bw file from results

* to have at least min num results
* to have results that are more recent that x secs
* to have results that are away from each other x secs

that are away from each other a min num of secs and have at least
x results

and the min num of secs that the results must be away from each
other.

Ticket27337 round bw

when scaling as Torflow

Ticket27336 cap torflow

Ticket27688 graphs stats

useful to combine data when plotting

Ticket27108 torflow scale