Re-added protocol-translators as plain files

src/translator/protocols/Custom.py

src/translator/protocols/Protocol.py

src/translator/protocols/Transport.py

src/translator/protocols/arp.py

src/translator/protocols/coap.py

src/translator/protocols/dhcp.py

src/translator/protocols/dns.py

src/translator/protocols/http.py

src/translator/protocols/icmp.py

src/translator/protocols/icmpv6.py

src/translator/protocols/igmp.py

src/translator/protocols/ip.py

src/translator/protocols/ipv4.py

src/translator/protocols/ipv6.py

src/translator/protocols/mdns.py

src/translator/protocols/ssdp.py

src/translator/protocols/tcp.py

src/translator/protocols/udp.py