Database download fails on windows

[dsst95]

If i try on windows run a database download with something like that:

import wfdb
import os

wfdb.dl_database('ahadb', os.path.join('C:', 'db'))

I get a 404 error because a \ is always added at the end of url as %5C, what is the path separator url encoded, which gets wrongly added to the url here: https://github.com/MIT-LCP/wfdb-python/blob/master/wfdb/io/record.py#L3384

[dsst95]

It would also be good if the csv-Files that contains classification information (for example REFERENCE-SQI.csv in the challenge-2016/training-a db which contains additional classification, which isn't included in the wfdb-headers) would be downloaded with this command.

[Lucas-Mc]

Hey @dennis95stumm, thanks for posting this! Yeah it looks like a silly mistake on my end when switching from Physiobank to PhysioNet that wasn't caught since it was being tested on Linux and OSX (Windows is weird) so I'll post the fix soon!

Downloading the CSV files and other files seems out of the scope of this package since it is only meant to extract the WFDB-compatible files such as RECORDS, ANNOTATORS, .dat, .hea, etc. If you wish to download all the files, you should use the wget command or one of the other options from the PhysioNet website, thanks!