Frame filtering by candidate list

This implements the frame filtering by the candidate list with formats that we discussed: h5, csv. In both formats we expect three datasets: trainId, pulseId, classId, which can be given under any name (parameter). The third options is EXDF format, which also can be read as h5 but it is read here with extra-data and due to that can be split on sequence files

@schmidtp @kluyvert @turkot