Week 3 exercises
snmp.py simply retrieves a few OIDs over snmp using Kirk Byers' snmp_helper library.
interfaces.py gets a variety of OIDs from fa4 of a Cisco router/
poll_ints.py retrieves input bytes on fa4 6 times. It puts the values it gets into a list. It then uses pygal library to create an SVG graph of the data and writes it to fa4.svg