Client class changes
Fix tp bag by remembering coords of last tp.
Remove functions of velocity's handling.
Fix move_position(added 0.5 offset in colculations, zero velocity in collision with border etc.)
Add max velocity.
Add left/right buttons to test_client1
Add functions to request_helper for WebSocket
Remove function from socket_spec to request_helpers
Add new websocket tests
Add websocket timeout and tick param for first request.
Socket tests refactoring