Feature: DHCP scope (PR #23)

[bias-keenly]

The current behavior of ptftplib is to use the entire network that the chosen interface is on as the DHCP scope. This is fine if ptftp is the only author of IP addresses on that network. In my case, however, I have systems with static IPs on that network. As such, I would need the option to specify a DHCP scope to the DHCP server.

Please see #23