keyboard.h: added constants for commonly used keys and reformatted
array so that gcc would be happy.
adbsys.c: new adb system.
bounds.h: bound-checking macros.
ite.c: new built-in mini-console.
8x14.h: no longer used by built-in console.
adb.c: replaced by adbsys.c
29f12f9bc6