S4 method to export genotype (.gen), map (.map), and parameter (fimpute.par) files compatible with [FImpute](https://www.aps.uoguelph.ca/~msargol/fimpute/).
saveFImpute(object, ...)
# S4 method for class 'FImputeExport'
saveFImpute(object)
# S4 method for class 'SNPDataLong'
saveFImpute(object, path = NULL)
No return value. Files are saved to disk.