Add test for file transfer
Sending png file to server working
Sending&Receiving file working
Improve tests
Server rebuild attempt 1
Add CodeBlocks project files
Add loop sending waiting images
Client receive old images on login
Some minor improvements
Add loop wait for requests
Logout working
Encoding sender in images
Downloading new messages from server working
End of message signed as \0 in images
Notofication when a message come
Theoritically client can send messages to server
Theoritically server can receive images from client
Partially working, client may get messages in wrong sequence, sometimes server reject request of sending image
Only remaining problem is invalid sequence of arriving messages
Some small fixes