New function op_del_row().
Added selection marks.
op_del() deletes the mark, if any.
Added mark copy, cut and paste.
New function op_del_mark().
Version 0.0.4 RELEASED.
Start new version.
Stored clipboard inside driver struct and added copy/paste functions.
Deleted useless code.
Selection mark can be extended.
Added a special char for unprintable chars in fb.
Added more C/C++ extensions.
Fixed old tabs in config.sh.