Edit files to work with Python3.

Replaced .next() on line 38 in collectmedia.py to __next__(). Replaced raw_input on line 46 in the collectmedia.py to input("...")
Edit files to work with Python3.

Replaced .next() on line 38 in collectmedia.py to __next__(). Replaced raw_input on line 46 in the collectmedia.py to input("...")