Make PP of binaries work again: Emulate write_binary_body/2 faithfully.

This is a replacement for the earlier hack of emulating write_binary/2
crudely, but we keep the "do not recurse" property.

NB: This introduces an incompatibility with earlier translations of io_lib.
Flush the jar from the cache...
Very crude stack trace support for interpreted mode. Prevents some errors, though.
(E.g. for "erlang:halt()" in interpreted mode.)
Update run-boot.sh.