Add download directory to the argument parser.

[hukkelas]

Author: Håkon Hukkelås [email protected]

Adds possibility to add --base_directory as an argument to download the dataset outside of the current folder.

[alkanen]

@PierreRheault would you kindly stop spamming us?

[haifa33]

please, is there a data annotation file for the proposed dataset? and if it is an xml file, it will be a great help

thank you