df = dftranspose(df::DataFrame, withhead::Bool)

Returns a transpose of a Dataframe.

FIXME: This is for DataFrames@0.20.2, as used in GenX. Versions 0.21+ could use stack and unstack to make further changes while retaining the order

path = choose_output_dir(pathinit)

Avoid overwriting (potentially important) existing results by appending to the directory name

Checks if the suggested output directory already exists. While yes, it appends _1, _2, etc till an unused name is found