Pypcap

- fix for finding libpcap on macOS

- drop workaround for missing `pcap_file()`

- make setup.py importable

- fix for immediate mode on linux (12)

- fix for immediate mode on Mac OS X 10.10

- minor bugfixing

- setdirection() support - from Eddi Linder

- make it possible to install without pyrex

- honor 'immediate' flag to disable buffering under Windows - by Kosma Moczek

- sendpacket() support - by Kosma Moczek

- API CHANGE: require 'cnt' as first parameter to pcap.loop()
- by Bartosz Skowron

- lookupnet() support - from Joao Medeiros

- findalldevs() support - by Bartosz Skowron

- better support for installing on Fedora, Ubuntu and Mac OS X