Merge pull request #2 from LenaBuranova/master

Изменен список аторов
README.md encoding: Windows-1251 -> UTF-8
Seq increment was moved to ReceiveMessage because of possible issue with scenario, when receiver gets equal sequnces of data with different seq numbers
Ambiguous QUdpSocket::disconnect was replaced by more presice static call of QObject::disconnect(sender, signal, 0, 0), which also removes all slots for sender's signal
SendTransaction::data_size_ is calculated correctly now
Some refactoring was made. id_ is correctly assigned now
Closing socket on finish
SendTransaction class was rewritten (to satisfy task requirements) and now blocks UI thread. It was also tested
Small fixes