Smart documentation

[Anders F Björklund]

I added the docbook manual for 1.2, but it
could be backported to a more minor release
by removing the chapters on Qt interface etc.

The added chapters on authorization and the
command options could probably remain though
(as they should be the same for 1.1 and 1.2)


Will set up a separate branch for it soon.
(backported from the old "testing" branch)

Maybe a rendered HTML copy could be hosted
somewhere on the project website perhaps ?

--anders