* begin adding dns pcap functionality
* improve question formatting
* work on capturing answers as well
* finalize DNS printing
* increase subfield limits
* add FlagContainer type
* prettier DNS printing
* improvements to dhcpv4 server
* begin adding examples/httpserver
* add better VLAN tagging methods
* pcap: add error printing; fix bug in CRC
* ipv4: ToS and Flags construction and flag manipulation improvements
* add dhcp interception to httptap and improve httpserver example