get_minimal_lomem.py added

get_minimal_lomem is like get_minimal.py except that it uses text files
instead of RAM to hold the lists of user IDs that it works through (it
also has logging and time delay based on get_soundcloud_data.py,
although there's a difference with the time delay in that once it
reaches max_attempts it starts taking very long - and successively
longer - delays until interrupted).