Do better on keyboard selection, plus save it in installed image.
Also, pv(1) output for install doesn't scroll anymore.
Clean up build_iso for readability, and workaround digest(1) problem.
Invoke kbd -s first-thing in kayak-menu
Kayak for ISO checkpoint 1

*** 41,50 ****
--- 41,55 ----
  0 /usr/bin/more
  0 /usr/lib/libgss.so.1
  0 /lib/libcrypto.so.1.0.0
  0 /usr/bin/ssh
  0 /usr/bin/scp
+ 0 /usr/bin/clear
+ 0 /usr/bin/tput
+ 0 /usr/bin/getent
+ 0 /usr/bin/kbd
+ 0 /usr/bin/loadkeys
  0 /usr/bin/mkfifo
  0 /usr/bin/dd
  0 /usr/bin/i86/ps
  0 /usr/bin/ps
  0 /usr/bin/i86/pfiles