new: vaex.read_csv_and_convert to convert (a list of) csv files to hdf5 and shuffle it
new: vaex.read_csv_and_convert to convert (a list of) csv files to hdf5 and shuffle it

maartenbreddels/vaex,maartenbreddels/vaex,maartenbreddels/vaex,maartenbreddels/vaex,maartenbreddels/vaex,maartenbreddels/vaex