Added min_df and max_df parameters, added support for documents that have more than 1000000 characters, and limit max keyphrase length to 8 words to prevent memory issues
update scipy requirements Signed-off-by: Tim Schopf <tim.schopf@t-online.de>
update scipy requirements Signed-off-by: Tim Schopf <tim.schopf@t-online.de>