Feature/network collect plugin

- Upgrade network collect plugin to netflow.
- Network plugin for services
why are you creating list of ip's (pricing objects)? Can't you call get_or_create when you are processing single IP address, and then call get_or_create on DailyPricingObject and then update value? 

Consider such situation: there are 100 000 IP addresses in database - 95 000 are no longer active, nfsen returns only 5000 addresses - you are creating list of 100 000 addresses (on the other hand, you will have to make 5k extra queries to get or create pricing objects - now you are getting them using 1 query)