range argument to filter_poses() would be convenience

[kayvonf]

When exploring the dataset, it's common to adjust the range of the pose results returned by filter_poses. Currently if you want to modify the default pose query range, you have to do this:

filtered = filter_poses('pose', hands_above_head, [Pose.LWrist, Pose.Nose, Pose.RWrist], Pose.objecfts.all().order_by('id').select_related('frame', 'frame__video')[0:250000:10])

To support the common case, it would be very convenient to support a named array argument to filter_poses(range=[min, max, stride]);

If you are worried about making it too easy to hang the server, add some error checking into filter_poses that errors out if the query requests a set of poses that is pretty large. (e.g., more than 2M).