dump_json function created, to be called once at the end of the process.
Drafted self.json_data structure for JMs review.
fixed json_dumps encoding not allowed in binary mode bug
fixed pprint import mistake
pprint isn't needed actually
json logging working for networks
ips
added subnets
Need to work on macs more, add address ranges
Merge pull request #12 from mpath/json_logging

Json logging