FTPVCS Release 12

It came to our attention that a lot of the VCS features were 'broken' in R10, and so we have been working hard to get these fixed.

R11 fixed the checkin, etc functions.

R12 fixes all the rest - SO it *should* all be working again!
R12 also comes with some optimisations over the R10 code, although it is still not really to a stage where a 56K modem user can comfortably work with it - but that time will come!