Tweak build flags
Update headers
Update struct field names for BSD
Uncomment lines from testing
Change _unix to _freebsd
Add FreeBSD libpcap.a, update README with FreeBSD build instructions; fixes #2
Tweak build instructions; fixes #2
Simplify linking to libpcap across OS's; fixes #2
Remove notes re linking against libpcap; fixes #2
Use relative paths for libpcap linking; fixes #2
Use -L/-l flags and relative paths for libpcap linking; fixes #2
Remove extraneous links to libpcap.a; fixes #2
Merge pull request #2 from VividCortex/freebsd-tests

Add FreeBSD support