Features / Changes:

Version increment 1.0 -> 2.0 : Implemented RFC 4293, the most recent
(2006) rev. of mib-2 as it applies to ip (4)

RFC 4293 obsoleted a bunch of objects in RFC 2011: marked as deprecated
in the get_[object] function comments.

Created flag $get_dep to instruct get_ip() to retrieve deprecated
objects (defaults to FALSE).

Added get_[object] functions for new objects defined in RFC 4293, added
those functions to get_ip().

Affixed copyright, versioning, and license info and added historical
info re: mib-2.

Bug fixes (incomplete list):

- Removed instances of "if (empty($data)) { continue; }". Values of '0'
  (zero) should be recorded.

- Corrected comments