Added nameless' sprites

SHODAN, girl, boy, clover and Yotsuba holograms; girl, boy, malf
versions of those and 4chan AI cores.
http://vg13.undo.it/forum/viewtopic.php?f=9&t=504
The other static, traditionally "malf" icon is.

Forced malf screens were disabled or coded out because they made it super easy to validhunt a malf AI, by just forcing your way into the core at roundstart and seeing what the AI's face was. It's the same reason the AI core camera faces the back of the core, rather than being able to see the AI's APC.