moveoff.comp: bugfix and clarify some varnames in lim3()

bug that showed on ubutntu10.04 2.6.32-rtai

- input.old_v = ( *lout - input.old_out ) / dt;
+ *old_v = ( *limited_out - input.old_out ) / dt;

Signed-off-by: Dewey Garrett <dgarrett@panix.com>
moveoff.comp: update .txt files

Signed-off-by: Dewey Garrett <dgarrett@panix.com>
moveoff.comp update man page, moveoff_gui Usage:

minor: missing $ on "input is already connected" msg
Signed-off-by: Dewey Garrett <dgarrett@panix.com>