Bulk task downloading

[vhavlena]

Add a simple script allowing bulk downloading of a couple of task files. Currently, you need to call get_tasks_and_generate_csv.sh separately for each file, which is a tedious work.

[jurajsic]

I use something like for line in $(cat tasks.txt); do ./get_tasks_and_generate_csv.sh "$line"; done for this, where tasks.txt contains the name of tasks files on separate lines.