Ignore pyc

Signed-off-by: Fam Zheng <famz@redhat.com>
Add command hmp, qmp and gdb, add switch --no-sdl

Signed-off-by: Fam Zheng <famz@redhat.com>
qsh: New commands and features

But undocumented.

Signed-off-by: Fam Zheng <famz@redhat.com>