Quality control guidelines, filters, & meta-data

[wendtke]

Merged with #13 and #44

See here for quality control guidelines and suggested filters per MW application type.

Is it also possible to provide users with the number of segments lost due to each of these criterion for easy reporting? Rather than "dropping" segments, can we remove them from the main data and provide the user with information on the invalid segments? For example, share number of the segments lost in a study due to established quality control guidelines (see #13). This would be useful for manuscripts down the line.

Originally posted by @wendtke in #13 (comment)