wrote manual pages

changed lock to $argv0 in screenlock

generated a re-sized bunny 30% of big jpg on sources

added initial set screen to black to blend with glanda's background

global var chatty which disables password prompt. Really
we need somthing like a dialogue box to prevent the password
entry messing up the picture. Rather than this I just made the
decision to drop the prompt, its easily restored if you think
this is a step too far.

[myself, I prefered 'lock' as a name]

-Steve