QAQC for puv statistics

[rallen-usgs]

limits for the built-in wave statistics (wh 4061, wp peak and wp 4060) seem to work well. These look something like:
wp_max: 8
wp_min: 0.25
wh_min: 0.02
wp_ratio: 2

Could we add qaqc for the puv waves? Specifically, cleaning u_br and Tpu, Tpp would be great. I don't think we can use the same cleaning techniques as the built-in waves, as they are designed for use with a pressure sensor, and the velocity sensor is measuring local waves. Or, if we decide that Tpp and Tpu are not worth focusing on, then just cleaning up ubr would be awesome.