 - implement select functionality
 - implement resizing
 - implement scrolling with ring buffer and not with copying
 - protect data with locks against concurrent access (1/2)
 - add more vt100 sequences
 - generalize lib, such that it can be used for other vt100 servers too
 - update american keymap
 - make keymap switchable at runtime
 - unify generated keycodes to one standard, e.g. VT100, maybe specify
   via termcap mechanism
