- event-driven model

+ TCP part of ICQ protocol      (Done in 0.2.0)
+ new user registration         (Done in 0.2.0)
+ chat                          (Done in 0.2.0)
+ file transfer                 (Done in 0.2.0)

+ SOCKS5 proxy support          (Done in 0.1.3)

+ search by ICQ#                (Done in 0.1.2)
+ add user to contact list      (Done in 0.1.x)