RF: Summary file in FMRIB config

See merge request !13

Rf/default rules

See merge request !12

basis of raw<-> new level comparison

on each variable

things (currently only one thing)

changes to navalues. Sorted all files by ID.

Rf/sparse config

See merge request !11

against a threshold.

Rf/sparsity categorical nan

See merge request !10

data points, not the total number of data points, when they are specified as
proportions.

Bf/flatten hierarchical na

See merge request !9