flows & templates in one packet

[fedy85]

The library doesn't accept new templates from packet, where are flows and templates together (as for example Cisco ASR 1002-X does for NAT logging). Easy fix woud be to split "else if" to a separate if condition for o.templates presence here https://github.com/delian/node-netflowv9/blob/master/netflowv9.js#L149