Made it much faster by using settimeout instead of poll. Made it easier for connect_client to acquire the lock. Fixed bug: the socket was closed before the thread was done. Made an attempt to make it work on Windows.

Fixed bug in __seq_between: 100 is now not between 42 and 42 anymore. Made some more debugs warnings. Lowered default window size.

Fixed bugs in managing the sent_ack_buffer. Made closing work with FIN 'n stuff. Fixed timing bug in regarding lost packets. Added dequeue_data_array. Decreased default poll time. Added view of sent_ack_buffer for debugging.

Made sequence numbers cycle to support files over 65KB. Fixed bug that causes SYN-ACK to not necessarily be ACKed. Fixed bug in enqueue_data.

Moved header packing functions into _Header, decreased first SYN nr range, added too low SYN check, added polling time param, added data_length check