Generic enrichment function

Calculates relative risk given the number of outliers with a variant, the number of outliers, the number of non-outliers with a variant, and the number of non outliers.

.enrichment(n.outliers.w.var, n.outliers, n.non.outliers.w.var,
  n.non.outliers)

Details

It is used in a bunch of different things and is internal