Merge pull request #3 from sssr33/master

Update
Stub for UdpClient
UdpClient stub. Changes from master
Work with UDP tracker protocol. Beginning
Finished UdpTrackerClient. Begin refactoring
UdpClient thread state
UdpTrackerClient
Merge pull request #4 from hadgehog/master

udp tracker client
merge changes
fixes for peer id make
merge from master