This gets everything working properly. Now --home works properly both
for gui-mode and cli, and all executables can be properly specified.
Ex:
./gbootroot --home . --template Example-Mini.yard --uml-exclusively on
--expect-program ./expect_uml
--uml-kerneluser-mode-linux/usr/bin/linux --root-fs-helper
root_filesystem/root_fs_helper
./gbootroot --home . --template Example-Mini.yard --genext2fs-dir
genext2fs/ --filesystem-command "genext2fs -z -r0"
# something like this does the trick: ./gbootroot --home . --template Example-Mini.yard --uml-exclusively on --expect-program ./expect_uml --uml-kernel user-mode-linux/usr/bin/linux --root-fs-helper root_filesystem/root_fs_helper