Opakowalem tworzenie surowego socketu.
Poprawione błędy w raw_socket.c
Enhanced raw_socket.c so that it doesn't cause warnings.
Added CRC-32 library
Partly implemented ethernet socket.

Sending data implemented.
Still to do: receiving packets, some refactoring,
computing CRC for tagged frames.
Merge pull request #1 from dextero/michal

Michal