Happiness update and fist running

The personal happiness lvl of a life form will now go down by 1 every
time he is punched. Can go down to 0 at the lowest.

LFs will now run from a fist if it comes within this range...

(default run range (60)) - (perhappy/2)

So now, the happier the LF is, the closer you can get the fist. Next
update will add a limit to personal happiness.