New function op_down().
New function op_up().
Added temporary saving.
New functions op_pgup() and op_pgdn().

For the first time, this modification has been done within qw
itself, make it the first self-contained modification.

This is a milestone :-D
Version 0.0.1 RELEASED.
Start of new version.
Included stdlib in qw_char.h.

This way it does not fail on not-knowing types like off_t
in older systems.